Ciel's right eye with his Faustian contract displayed.
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Earl Ciel Phantomhive (シエル・ファントムハイヴ, Shieru Fantomuhaivu) is the current head of the Phantomhive...
Ciel on the cover of Volume 6. Ciel, on the cover of Volume 18.
A Faustian contract or a deal with the devil, is a link and bargain between a human and a demon...