Black Butler fans often ask the question "How old is Sebastian?" not only because of the character's immense popularity in the franchise, but also due to that being a very compelling mystery.

Black Butler's rich story sees Ciel Phantomhive and his demon butler Sebastian investigating strange and supernatural murders ...

If they do, though, Black Butler has only ever gotten more intriguing with time, and its ninth arc, the Blue Cult arc, dives into Ciel’s true backstory, his trauma, Sebastian’s origins ...

Public School Arc, saw Ciel Phantomhive begin his investigation into Derrick Arden’s disappearance under the Queen’s orders.