Caine:- (Working On A Redesign)
Caine is Fang's loyal "servant" and familiar, Fang practically raised him and Caine see's him as a brother.
Caine used to be a lost soul, bound to turn into monster scum, unstable and full of confusion and rage. luckily Fang was roaming the forest that Caine was in, the male was only a black mass able to shapeshift into a blackbird with white eyes, Fang found Caine and they instantly bonded. Fang offered Caine, which at the time was only a young child, a home and roof over his head and food in his belly if he was to follow Fang's orders, He accepted and once he was grown was gifted with immortality from Fang, and asked to be Fang's familiar which Fang would hesitate but Caine pleaded and begged so he eventually caved in and accepted. Now Caine loyally sticks by Fang's side as a best friend and "guard dog".

 Caine is very attached to Fang as it’s really the only “family” he ever had or known about. Caine worries about Fang sometimes and even questioned his way at first but Fang's grin and insanity just pulled him in for the ride and he became tricky and a bit crazy. Caine shares a bit of Fang’s personality, whether some of Fang's personality got put into Caine when they made the bond contract or it just rubbed off on Caine since they have been together so many years, it’s not clear. Caine is an extremely good liar you can’t tell if he is lying or telling the true half the time, since he has been around Fang so long he often knows more than you probably do and is probably the one behind the problem you’re trying to solve but you will never know because he plays right along. Only Fang can see right throw his lies.
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A voice similar to that of Sam Riegel's work as Mephisto Pheles in the dubbed version of Blue Exorcist, but not exact.
Art Work of Caine: https://sta.sh/21am0lanj56r?edit=1