Mister Sinister: During the 19th Century, Nathaniel Essex encountered Apocalypse who used his technology to transform Essex into “Sinister”, the last word his dying wife ever spoke to him. (Name only) Uncanny X-Men #212 (1987); (in shadow) Uncanny X-Men #213 (1987); (fully) Uncanny X-Men #221 (1987)
Former thief who served as field leader. Infiltrated Apocalypse's Horsemen in X-Men, vol. 2 #184 and then Mister Sinister's Marauders. On-and-off boyfriend of Rogue. His primary weapons are cards, and his secondary weapon is his bo staff. Formerly a senior staff member at the Jean Grey School for Higher Learning.