The elder twin brother of Abel Nightroad and the main Antagonist of the story, Cain is the oldest of the Test Tube Babies who was once the beloved leader of the Mars Colonization project.
Because of an accident, his younger brother Seth injected him with Crusnik nanomachines, a sort of vaccine that turns normal humans into vampires that feed on the blood of other vampires. This saved Cain’s life, but it also drew him into insanity. His decision to support the Vampire Returners and to murder prototype Lilith Sahl angered Abel and Seth, killing Cain in the process. But it seems even turning Cain’s Crusnik body into ashes is still not enough to stop him, as he is able to regenerate later on in the series.
This is a most impressive cosplay of Cain! It’s rather controversial that Cain looks angelic and Abel looks demonic, when the two of them play opposite roles! But you really have to love the details of his armor!