Kaldor Draigo

Kaldor Draigo is Supreme Grand Master of the Grey Knights, a title he still holds from inside the Warp after Mortarion dragged him through a gate and the Chapter could not drag him back. Titan trains killers of daemons. Draigo became the proof that the curriculum works too well.

He carved his name into the Daemon Primarch's heart, walked the Garden of Nurgle, and has spent centuries fighting a war that does not have a front line. The Chapter still elects him in absentia. That is either faith or stubbornness. On Titan those are the same thing.

Whether he can ever stand on real stone again is a question the Grey Knights answer by continuing to use his name as an order.