Late Inquisitor named Kane was a mentor to @Saul, he chose him for his intellect, will and psychic abilities and trained as his Acolyte, then Interrogator. Mentor died under mysterious circumstances, leaving @Saul with a number of unfinished investigations and dangerous secrets. @Ivahn and @Morty were a members of his retinue, @Mael was his research project, @Tubal Kayn was his associate.