Your ideas definitely have merit if I wanted to tie this figure to the Death Company, but it's not the case. The title of Custodian of the Dmaned is already established in the Devastation of Baal novel and is related ta a different group within Blood Angels - the occupants of the Tower of Amareo.
While Death Company indeed are the Lost for the Blood Angels (battle-brothers lost to the madness of the Black Rage), the Amareans were never battle-brothers to begin with. Those poor souls became mindless monsters due to their gene-seed rampant malunction and hyper-activity after implantation.
I really appreciate that Guy Haley presented a title that is noticeably (if subtly) different than those of both Lemartes and Astorath.
Edited by Majkhel, 28 September 2020 - 04:08 PM.