Finnian (フィニアン, Finian), often called "Finny" or "Finni," is the gardener of the Phantomhive household.
Finnian is a young boy with large, turquoise eyes and pale skin. He has short, messy, strawberry-blond hair clipped back with five red bobby pins—two on his right and three on his left.
Finnian usually wears a plain top with red piping around the collar and plaid pants along with black knee-high boots. He also sometimes sports a straw hat—he adores the hat because it was given to him by his young master, Ciel Phantomhive—around his neck to conceal a mark reading "S-012," which had been imprinted on him during his time as a test subject.
Like the other Phantomhive servants, Finnian has lots of respect and considerable fear for Sebastian Michaelis. He is also exceedingly loyal to Ciel Phantomhive, whom he views as his savior. Finnian is naïve and tends to burst into tears whenever he has done something disobedient or witnessed something immoral. According to Sebastian, he is an idiot with a bad memory. He is exceptionally strong to the point of being able to lift a marble pillar with ease, and he has to be very careful when doing work that utilizes his strength, for he might unintentionally break or damage something. Due to his past of constant imprisonment indoors as a test subject, he consequently loves being outdoors while working at the Phantomhive Manor and enjoys his work very much.
Little is known about Finnian's past. He was "picked up" by Ciel Phantomhive and admitted to the Phantomhive household as the gardener.  At first, his fear stopped him from going outside because it was hard for him to touch things without breaking them. Yet this fear gradually disappeared, and eventually he enjoyed being outdoors.
Before becoming a servant for the Phantomhive family, Finnian was held in captivity, forced to watch his friends get killed and kept indoors while frequently receiving numerous injections of an unknown substance. His captors are responsible for the tattoo on the back of his neck and the injections, which are probably the reason for his superhuman strength. It is also revealed that he was not the only person that has been experimented on. While Finnian and the others were being held captive as experimental subjects, a sudden raid was conducted on this certain institution. The conductors decided to destroy all the files and the "results" pertaining to institution's seemingly illegal activities. In order to stay alive, Finnian killed the doctor who killed his fellow inmates and who was also about to kill him. He escaped the facility and was found by Ciel and Sebastian.
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Black Butler Arc
Finnian and the servants are all outside the mansion after lunch; impressed with Sebastian Michaelis as he effortlessly defeats a martial arts master. Sebastian asks him if he has finished weeding the garden. Since he has not yet done it, Sebastian orders him to get to work. Once they have gathered, Baldroy suggests that since a guest is coming, they will have a chance to get ahead of Sebastian. Mey-Rin and Finnian agree to his plan.
However, he uses extra strength weed killer on the garden, and everything is ruined. Nevertheless, Sebastian orders them to follow his instructions exactly, and everything will be fixed. Working together with Baldroy, they are able to turn the ruined garden it into a zen-inspired Japanese garden. Sebastian says that they are able to fix any problem because they are Phantomhive servants. He orders them to remain vigilant until their guest leaves.
Finnian is next seen watching Baldroy fix the meat as per Sebastian's instructions. Once everything is prepared, Sebastian asks them all to remain calm at dinner tonight. He is watching behind the door when Mey-Rin spills the wine on the tablecloth and watches dumbfounded when Sebastian removes the tablecloth. Along with Baldroy, they quickly escort Mey-Rin away.
Elizabeth Midford arrives at the mansion and makes everything "cute." Tanaka is turned into "Antoinette." When she does the same to Sebastian, Baldroy, Mey-Rin, and Finnian laugh. However, they are immediately silenced with one look from Sebastian. She wants to hold a dance party with even more extravagant costumes. Ciel agrees and everyone participates.
However, when Elizabeth takes his ring, Ciel Phantomhive yells at her to give it back. Everyone is surprised at his tone. Once she breaks the ring, they are even more surprised to see him throw the shards out the window. Ciel announces that ring or no ring he is still the head of the Phantomhive household. When Sebastian starts to play the violin, Ciel dances with Elizabeth. Baldroy, Mey-Rin, and Finnian are surprised that Sebastian can play the violin. Finnian dances with Tanaka; while Mey-Rin only has eyes for Sebastian and wants to dance with him, but Baldroy laughs quietly knowing that will not happen.
All of them (Baldroy, Finnian, Mey-Rin, and Tanaka) are working together to catch mice in the manor. Finnian throws a statue at the mouse. A shocked Baldroy asks if he was trying to kill them instead. Ciel walks through the hall towards his study and gets annoyed by their antics; hoping to find some peace and quiet. Sebastian immediately catches the mouse and tells them to stop playing around and get back to work.
After the gun men's attack, Finnian and Baldroy come running to see what happened. Sebastian hands Baldroy the pie and tells them all to clean up. Before Baldroy can ask if "clean up" also includes the pie, Sebastian disappears.
The three of them are agonizing over whether or not they can eat it. Seeing his grumpy mood, Mey-Rin offers Baldroy some milk, but he says he does not want any. In the end, Baldroy decides to eat it. He tells Mey-Rin to get tea, and Finnian to get the silverware. However, Finnian notices that all the silverware is missing.
When Ciel returns, they rush out to greet him. They are worried that he is hurt, but Ciel assures them that he is not. They laugh then; claiming he must be having fun being so held up so high (Sebastian is carrying him in his arms). Later on, they are seen reading the paper about how the Italian family merchants have been wiped out. They wonder who could have been so powerful to do such action. Sebastian immediately orders them to get back to work.
Red Butler Arc
One month after the Jack the Ripper incident, Francis and Elizabeth Midford pay a visit to Phantomhive Manor. As Finnian wanders around the garden after mowing the lawn, he notices that the roses of the Christmas season have already bloomed.  Upon seeing this, he immediately reminds the rest of the servants about the special day.  While Francis, Elizabeth, Ciel, and Sebastian go out to the forest; Baldroy, Mey-Rin, and Finnian prepare a surprise birthday party for Ciel, which include baking their own cake and using flowers that they took from the garden to decorate the manor. They manage to prepare something for him although Ciel is shocked to see them in a horrible state. On his 13th birthday, Aunt Francis also asks the servants, no matter how awkward they are, to continue to take care of Ciel and Elizabeth. Within a short time, Finnian tells Ciel it's snowing; completing Ciel's birthday.
Indian Butler Arc
Finnian, Baldroy, Mey-Rin, and Tanaka go to the London townhouse with Ciel and Sebastian. Ciel has to investigate the Anglo-Indian attacks, and Sebastian does not trust the three of them. He fears that they will burn the manor down without him available to watch over them.
When Agni and Soma Asman Kadar come to stay with Ciel, Agni is given the task of cooking dinner, much to Baldroy's initial dismay. Finnian goes to the kitchen because he smells something good, and Agni asks if he would like to help. Finnian initially says that Sebastian would not allow him to because he is too strong, but Agni gives him the task of mashing potatoes something that plays to his strength. Eager to be allowed to help, Finnian completes the task easily.
When Ciel decides that Sebastian will represent his company at the Curry Fair, Baldroy, Mey-Rin, and Finnian aid Soma in taste-testing curries. They are also seen at the competition, presumably as a treat from Ciel, and praise Sebastian for his win afterward.
The following day, when they learn that the Scotland Yard will be paying them a visit, Sebastian orders Finnian to brush the snow from the trees to make the yard look better. When he can't easily get the snow off the top of the tree, he hits it and accidentally knocks it down. Agni, who is quite tall, raises Finnian on his shoulders and teaches him to be nice to all living things, including plants.
When the first-string circus members (excluding Snake, Joker, and Doll) attack Phantomhive Manor, Finnian, Baldroy, and Mey-Rin take on the offensive after Jumbo's assault on Finnian. Jumbo runs into a just-awoken Finnian, who tells him to come back later. Jumbo hits him in the head and leaves, thinking that he has killed him. However, Finnian stands up and smashes Jumbo into the wall. Jumbo is left alive long enough to yell to Peter and Wendy to escape, but Finnian smashes his head for the second time, killing him.
Peter and Wendy then attack Finnian using whip-like weapons. They made a hole in his hat, and he throws heavy items at them in return. He yells at them that they shouldn't have damaged the hat that Ciel gave them. He loves this place, and he will do anything to protect it. The two of them then decide to string a wire between them and slice Finnian in half. Before they can do so, an unseen sniper (who is revealed to be Mey-Rin), shoots and kills Wendy with a single bullet to the head. Peter then abandons pursuing Finnian to take out Mey-Rin.
Inside the manor, Finnian goes to Baldroy's aid and lifts heavy statues to throw at Beast and Dagger. They flee, and they eventually end up in the basement. Baldroy takes out Dagger with a machine gun, which also shoots a lot of flour into the air in the process. Finnian goes to help Baldroy again, creating a hole in the wall, and he helps Baldroy out of the kitchen. He then watches as Baldroy throws a lit match into the kitchen, creating a massive explosion that kills Beast.
Later, when Ciel and Sebastian return to the manor, Mey-Rin, Finnian, and Baldroy are reprimanded for destroying much of the mansion in eliminating the first-string circus members. They are set to work cleaning up the mess. When Nina Hopkins arrives, Baldroy and Finnian go to greet her, but are blatantly ignored, much to Baldroy's annoyance.
Phantomhive Manor Murders Arc
Charles Phipps and Charles Grey arrive at Phantomhive Manor to deliver a message. On the way out, they pass by Finnian. Phipps comments that "this side is still too easy" and appears to attack Finnian. However, it is shown that he merely wanted to fix Finnian's hat, which he did by sewing a flower over the hole. This surprises Grey; it leaves him wondering if Phipps always carries a needle while Finnian waves goodbye and profusely thanks Phipps.
When Georg von Siemens is found dead, Finnian helps Baldroy move the body to the cellar.  When asked for their alibis, the servants say that they were cleaning together. When Ciel is accused of being the murderer, Finnian tries to defend his master, but Ciel tells him to stop.  While sleeping after the party, Sebastian wakes Finnian up. He then tells Finnian to care for the fireplaces first thing in the morning. Finnian is the first to find Sebastian dead the next morning. He and Mey-Rin try to console Ciel although he is also crying; Finnian even gives Ciel his coat. When the other guests begin discussing how Sebastian was killed, he yells at them to stop saying such insensitive things in front of Ciel. Tanaka, whom Ciel appoints as his new temporary butler, gives the servants their jobs and sends them on their way.
The following morning when Patrick Phelps is missing, everyone tries to get into the room he was staying in, but it is locked. Finnian is about to break the door down, but Charles Grey beats him to it. Later, Arthur Conan Doyle tries to put the three deaths in order. The servants state that Sebastian talked to them all the night of his murder, and this proves he was the last to be killed.
Ciel is asked to lead a group to see if Sebastian had the key to Ciel's room, but he asks Finnian and Baldroy to guide them to the bottom floor. Finnian becomes distressed when Arthur and Ciel begin searching Sebastian's body in the cellar. He then yells at Arthur, but is reprimanded by Ciel. The group then goes to search Sebastian's bedroom. They search through the entire room, but cannot find the key.
The key is still not found after all the luggage is checked, and Lau comments that Sebastian might have thrown it out the window. Finnian volunteers to search for it outside, and Mey-Rin decides to do the same. Ciel tries to stop them, but he exclaims that he wants to solve the case and runs outside with Mey-Rin. Baldroy follows them to try to get them back inside, but they refuse. Finnian reminds them that everything they have is because of Sebastian and Ciel and begins to cry. Baldroy reminds them of their job to protect the manor and Ciel. Tanaka then offers them an umbrella and tells them that they do not have enough food. They all go to the kitchen and begin planning how to deal with the lack of food. Upon the discovery of Jeremy Rathbone, the servants capture and tie him up. They bring him to Ciel while Finnian searches Jeremy's pocket for a ticket which proves Jeremy's innocence. When Jeremy is freed, he asks that the bodies should be placed in separate rooms, which the servants were left to do. Finnian says he thinks they can trust Jeremy, but Baldroy and Mey-Rin tell him that trusting people too much will only get him hurt.
Later, the servants are trying to figure out what to serve for dinner since they are out of provisions. Jeremy comes in, and he helps them prepare dinner out of the few ingredients and herbs they have. After supper, the servants watch as everyone compliments the food.
When everyone is waiting to see who Patrick's killer was, the servants all stand around Ciel with makeshift weapons to protect him. After Jeremy reveals who the killer is, Finnian brings up Irene Diaz's mysterious "dark red liquid." Mey-Rin and Grimsby Keane yell at him, but Jeremy explains anyway. His explanation leaves the servants exasperated.
At Sebastian's funeral, Finnian is one of the people who carries his coffin. After being buried, Finnian notices that the bell in Sebastian's grave is ringing even though there is no wind. He then begins digging Sebastian's grave, and the others follow him. When Sebastian is completely unearthed, and they find that he is still alive, the crying servants, and Elizabeth jump on and hug him.
Luxury Liner Arc
Sebastian informs the servants that there will be a new servant. Snake's snakes then enter the room and cause Baldroy to hide behind Finnian. Finnian allows one to crawl around him and calls it "friendly." Snake begins naming all of his snakes, while Finnian begins talking to the snake crawling on him. Later, he is showing Snake around when Elizabeth shows up.
A month after the unprecedented accident of the ship Campania, Elizabeth and her brother Edward, celebrate Easter at Phantomhive Manor. Elizabeth decides to do a traditional game of egg hunting. Upon Charles Grey and Charles Phipps' arrival, Sebastian applies small changes on the egg hunt's mechanics by adding a few deviations from the game of egg tapping. This leads to Finnian being paired up Snake .
Finnian starts looking for eggs with Snake's (and his snakes) guidance, at one point leaving his partner behind. He then comes back with a bunch of eggs and a 'burned up' because one of the eggs blew up in his face. Yet, he finds Snake dizzy and lying on the ground with his snakes, and all of their eggs are already broken. This then disqualifies them from the game.
Public School Arc
Ciel enters Weston College and eventually, gets to participate in the prestigious dormitory Cricket Tournament. Finnian, together with Baldroy, Mey-Rin, Tanaka, and Elizabeth watch Sapphire Owl's game against Scarlet Fox . Finnian asks Baldroy why members of Blue House get out so fast. Baldroy explains the situation and the game's mechanics and rules, which makes Finnian conclude that the game is going to be a complete disaster. Baldroy mentions he made a special meat pie for lunch. However, Finnian and Mey-Rin find it so troubling because it might lead to Elizabeth getting poisoned. They fear that Edward would conclude that their master is scheming against the Midfords. When lunch comes, the pie Baldroy made mysteriously disappears which relieves Finnian's and Mey-Rin's worries.
Finnian, Mey-Rin, Baldroy, and Tanaka later witness the birth of the second "Miracle of the Sapphires" as Blue House wins the tournament. They are also seen at the boat parade and celebrating the victory afterwards.
They all welcome Ciel and Sebastian back home after the pair returns from boarding school. Baldroy explains that Old Man Sam's fence broke and all the sheep escaped. Mey-Rin tells one of the sheep not to eat her dress. Finnian and Snake chase after the sheep as well. Ciel suddenly laughs and tells Sebastian to handle the situation.
Sebastian in the morning supervises the entire household's chores. Then Finnian, Snake, Baldroy, and Mey-Rin accompany Ciel and Sebastian to London. Mey-Rin and Finnian marvel at a large clock, and Baldroy explains that it's Big Ben. Ciel takes all of them with him as he goes through different stores. Finnian wants a straw hat as cool as Big Ben; Sebastian pats his heat and tells the haberdasher to just give him a normal one. Finally, they are at a store where the latest Funtom perfume is being sold. Suddenly, a scream shatters the air, and Sebastian leaves Ciel in Baldroy's care. Later, a crowd of people rushes to buy the perfume, surprising everyone.
Emerald Witch Arc
All five members of the household accompany Ciel and Sebastian to Germany. Standing in the village square, Baldroy complains that his butt hurts since they've been sitting for so long. Shocked, Mey-Rin replies that he's being indecent. Finnian is overheard speaking German by Snake who questions him about it. Finnian replies that he can speak a little. Sebastian instructs them to load the luggage in the second carriage. Then they all proceed into the Werewolves' Forest.
The group suddenly sees a village in the forest, and everyone disembarks from the carriages. Baldroy and Finnian both call out to see if anyone's there.  They are all then unexpectedly surrounded by angry villages who are waving their pitchforks at the group. Finnian tries to reassure the villages that they are not "rats." Once the situation is resolved, they head with Sieglinde Sullivan to Emerald Castle.
When they arrive at the manor, everyone is amazed at its magnificence. Finnian wants to touch some flowers that he's never seen before, but Sieglinde immediately stops him, stating that the flowers are poisonous. Inside, Sieglinde tells Wolfram Gelzer to show the servants to their quarters. Later, although they all offer to help, Sebastian tells them to rest after their long journey.
During the night, Ciel and Sebastian attempt to investigate the forest clandestinely, but are poisoned by the miasma. When Ciel regains consciousness, Finnian is holding his hand, and Snake is by his bedside. Sebastian reaches his hand out to Ciel when Ciel unexpectedly knocks it away. Ciel then grabs hold of Finnian, surprising everyone. He says "Ciel doesn't want pain anymore"; this confuses everyone even more. When Sebastian tries again, Tanaka stops him. Ciel suddenly starts screaming about the lights being too dim. Everyone feels that his eyesight may have been affected by the attack as well.
In the morning, Sebastian greets all of the servants. After he tells everyone what to do, Sebastian sighs and tells Finnian to take care of Ciel. Finnian is about to happily agree; yet, he shrieks when he understands what Sebastian has asked him to do. Sebastian tells him to feed Ciel some food; if he doesn't have any appetite, he can give him some warm milk with honey.
Finnian continues to take care of Ciel. When Ciel refuses to eat, he offers him milk with honey. However, he blows too hard on the warm milk (at the speed of 50m/s). The milk splashes all over Ciel. Finnian immediately offers to clean him up. He even offers to take Ciel outside, but Ciel replies he's extremely afraid. Determined, Finnian responds that on the day Ciel gave him a name, he decided to protect him. Ciel softly answers he's not worth protecting. Ciel starts crying; seeing his tears, Finnian also starts crying. Finnian then recalls his past. Presently, Finnian tells Ciel that he and Sebastian made him into who he is now. Ciel tells him he doesn't want Sebastian here, upsetting Finnian.
Later on, Sebastian brings Sieglinde to see Ciel. Finnian happily points out that she is speaking English now. Sebastian quietly tells him to clear the dishes and leave. Sieglinde proceeds to change Ciel's bandages.
Sieglinde then addresses the rest of the Phantomhive household. She tells them that Ciel's eyes are fine; the condition was mostly psychological. All of them are extremely relieved. Baldroy immediately suggests that they head back to the manor so Ciel can get some real rest. Mey-Rin states she knows he just wants to cook him some meat. Finnian wants to make snacks, and Snake wants to make scones-all for Ciel. Sebastian sighs and asks them not to increase the workload.
After Sebastian receives John Brown's letter, he heads to Ciel's room. There he asks Finnian to leave for a while. Although Finnian resists with all his strength, he is unable to stop Sebastian. After Sebastian throws him out of the room, Finnian is shocked that Sebastian didn't even flinch under his full strength.
The servants are all reunited after Ciel recovers. Sebastian opens the door, and all of them tumble into the room. Sebastian remarks that they're really rude for listening at their master's door. Finnian tries to lunge on to Ciel, but Sebastian stops him. Ciel smiles and offers him his hand instead; crying with relief and happiness, Finnian takes it.
All of them, Sebastian included, line up by Ciel's bedside. Ciel speaks—because of his carelessness, they all suffered and worried. He asks them to forgive him. Although they are surprised, he adds determinedly that they will never see him in such a sorry state again. He finally asks that they continue to serve him. They all respond with "Yes, My Lord."
After a few minutes of the servants' light banter, Ciel also makes another request—he wants them to forget how he was until now. Mey-Rin deduces that Ciel also recalls his off-the-charts behavior. Ciel adds that he didn't want to behave like that. Baldroy concludes that Ciel reacted the same way as soldiers. On the battlefield, when they are wounded for the first time, they panic. Sebastian wonders if the attack's aim was purely psychological. When Ciel asks him to explain, Sebastian relates the news about the Queen's letter. He also had the components of the antidote analyzed. When Ciel reads the Queen's letter, everything starts to fall into place. However, he's incredibly annoyed with the Queen's final request—she wants the "little green witch to come to tea."
Ciel knows this request won't be easy to accomplish. Sebastian adds that even the Queen's selfishness is incomparable to Ciel's. Finally, Ciel tells the entire household to make preparations to leave—further instructions will come later.
The entire Phantomhive household is hiding and waiting in the forest. Mey-Rin whispers that it's starting to get noisy. A flare suddenly lights up the night sky. Baldroy yells it's about time. He adds their boss is calling them, and they all head out.
In the forest, the household is trying to find Ciel. Snake states Goethe smells Smile over there. Mey-Rin takes off her glasses, confirming that it is Ciel. When they reach him, he states their retreat plan starts now. They split into two groups and escape. Snake tells Baldroy he can feel them coming. Baldroy asks how he can tell—Snake responds through Arthur that his snakes can feel vibrations with their skin.
At this point, Finnian, Tanaka, and Mey-Rin split up from the others. Finnian rapidly runs while carrying Sieglinde. Remembering the day Ciel and Sebastian explained his new name to him, he switches to lightning speed. Although the "villagers" keep firing at them, Finnian escapes by jumping off the cliff. Nonetheless, they reach the edge of the cliff and keep firing. Suddenly Mey-Rin takes out them one at a time, and the rest retreat. She suddenly notices movement; a female officer, Grete Hilbard, appears in front of Finnian, claiming men are useless. Mey-Rin yells at Finnian to run. When Grete fires, Tanaka suddenly appears and uses his sword to cut through the bullets. He tells Finnian to go on ahead; as the Phantomhive servants, they will carry out any order their master gives them.
In the underground room, Diedrich orders Baldroy and Snake to put coal in the furnace of the train. Finnian, carrying Sieglinde and "small" Tanaka, also arrives alongside Mey-Rin. Snake receives Keats, who showed the group the way. Baldroy tells Snake and Mey-Rin to check the oil; he also tells Finnian to open the gate. 
Once the train starts, Baldroy tells Finnian to get on. Suddenly, Wolfram arrives. The group panics when they think that he's going to attack them. However, he shoots a soldier who was going to attack Sieglinde. At the same time, Wolfram is shot by the female German officer, Hilde Dickhaut, who yells that he betrayed them. She next aims for the group. Before she can kill them, Sebastian and Ciel arrive just in time to save them. Plunging his knife into her throat, Sebastian states some food escaped from the oven.
The entire group then arrives at Diedrich's castle; Finnian is carrying Wolfram. Finnian, Baldroy, and Mey-Rin comment on how big the house is. However, Heinrich says this castle, Weizsäcker, is small compared to the other castles. Ciel looks at Diedrich and comments that he's a rich boy. The wounded are all treated; Mey-Rin and Tanaka offer to help since they are not injured.
Wolfram and Sieglinde are disguised on their journey to England. Before Ciel leaves, Diedrich tells him to be careful. When the group arrives in London, Sebastian asks Wolfram to refrain from speaking in German because it will draw unwanted attention. The servants leave Sebastian, Ciel, Wolfram, and Sieglinde and proceed to the mansion. When the group returns, the servants all greet them. The entire day passes in light fun along with Agni, Soma, and Elizabeth.
Blue Cult Arc
At Phantomhive Manor, Sebastian gathers Finnian, Baldroy, Mey-Rin, Snake, and Tanaka, and gives each of them instructions, save Tanaka, who is told to remain as is, for the upcoming Halloween celebration. Baldroy, Mey-Rin, and Tanaka share details on the American, Chinese, and Japanese Halloween traditions, respectively, which inspires Sebastian.
On Halloween, Finnian and the other servants, dressed in costumes, greet Ciel, when the latter arrives. Finnian, then, mingles with the tenants of Phantomhive land, whom the celebration, which features a combination of various Halloweens from around the world, is primarily dedicated to. Later, Finnian and the others set lanterns afloat into a river to end the night.
At Phantomhive Manor, Mey-Rin, Baldroy, and Snake greet who they recognize as Ciel, while Finnian has reservations.
Sometime later, Ciel and Sebastian enter the manor, where the servants greet Ciel. Ciel is confused when Baldroy asks him why he went out "again" in the rain.
At that moment, "Ciel Phantomhive" descends the stairs, to their collective shock. He scolds a dismayed Ciel for getting drenched, and assures him that he will never leave his side again, and that he has come home. When Finnian states that it is impossible for there to be two Ciels, "Ciel" asserts that he is real. Finnian adds that he knew something was wrong when "Ciel" came home, and calls him an impostor. Amused, "Ciel" declares that the head of the Phantomhive house, Ciel Phantomhive, is actually he.
To Finnian's and the other servants' disbelief, Sebastian confirms that "Ciel" is the real Ciel Phantomhive. Tanaka soon confirms the same thing and tells them that, fifteen years ago, Rachel Phantomhive gave birth to twins. Pressured by "Ciel" to explain why he deceived them, Ciel calls himself "Ciel's" spare.
- (To Agni, who tells him to handle the trees with care) "With care, huh? That isn't something I would have understood before coming here, but now it makes perfect sense!"
- (To Agni) "Before, I didn't get to go outside like this all the time, so now every day's a lot of fun! I can come in contact with trees and insects . . . and people too. But, at first, I was frightened. It's really hard for me to touch something without breaking it."
- "The young master doesn't give me injections every single day like those other people did. Young master doesn't make my friends and I kill each other. Nor does he keep me locked up. I love this place. And that's why I made up my mind. I'm going to protect this place."
- "If not for Mister Sebastian, we would never have been able to come here to the manor. I'd never have been able to go outside or . . . feel the rain on my skin like this. No home to return to. No friends. No freedom. Every last thing . . . was given to us by the young master and Mister Sebastian."
- (To Ciel Phantomhive) "I wouldn't be here if it wasn't for you! I couldn't do anything but destroy. But you taught me how to grow! You made me from #12 into Finnian."
- "Faster than a hare or a bullet. I'll run through this forest faster than anyone. Because I'm . . . Finnian!"
- He appears to be able to speak a little bit of German.
- Finnian's favorite food is Omurice, because Sebastian always decorates it with a little flag. He also likes donuts and deep-fried food, especially deep-fried buns.
- Sebastian is the one who taught him how to read.
- When attempting to join the circus, Ciel uses Finnian's name as his cover, but Ciel states that his occupation is a former pageboy instead of a gardener.
- Ciel is the one who gave Finnian his name. He based it off of Fenian Cycle, which is a composition of tales and ballads centering on the deeds of the legendary Finn MacCumhaill and his war band, the Fianna Éireann. It is part of a series on Celtic mythology.
Out of Universe
- According to the official Kuroshitsuji character popularity poll, Finnian is the tenth most popular character in the series, with 193 votes.
- In the two times that the number on Finnian's neck are shown, they are different. Initially, it says "S-012," but the second time it is portrayed, it reads "S-12."
|"Ciel Phantomhive" • Ciel Phantomhive • Cloudia Phantomhive • Rachel Phantomhive • Vincent Phantomhive|
|Baldroy • Finnian • Mey-Rin • Sebastian • Sebastian Michaelis • Snake • Tanaka|
|London townhouse • Phantomhive Manor • Funtom Corporation • Funtom Music Hall|