Following Ciel Phantomhive and Sebastian Michaelis burning Baron Kelvin's manor and killing Doll, Undertaker observes the burning of Kelvin Manor from afar, while playing with charms. On one charm, there is a date and a name engraved: "13 July 1866, Cloudia P."
He says that he has warned Ciel to hold every soul dear, and states that Ciel will understand the importance of things that cannot be recovered once it is too late.
Luxury Liner Arc
Before the Campania begins to sink and tilt heavily, Grell Sutcliff begins fighting with Undertaker. Water begins flooding in and Undertaker decides it's time for him to leave. Sebastian Michaelis and Grell then attack him simultaneously.
He dodges both but drops his chain of lockets, which Ciel Phantomhive grabs. He decides to leave his "treasure" with Ciel and tells him to keep it safe. Undertaker then says farewell and slices the ship.