*holding your face* GIVE. ME. THE. LORE!!
AND WHY DOES BISHOP GIVES ME DEATH FROM PUSS IN BOOTS VIBES?!?!/POS
Ah, that would be because Death was a huge inspiration for Bishop's "Wulfe" Form. This is his official design.
There's so much lore, I'm not sure where to start sometimes --
But, Bishop can oftentimes be cold hearted towards humanity due to his less than stellar childhood and he prefers yokai. His goal is to make the surface a place Yokai, Mutants, and humans can co-exist peacefully. He wants the turtles as his poster children, because who better to be the catalyst for change than the mutants who helped save the world!
Except... he wasn't expecting them to be actual children and uuuh, that throws a wrench into his plans because he refuses to use them for a political agenda until they're old enough to understand it and properly consent to it.
However, he and Leo end up with a mentor/mentee relationship after running into each other over the course of several weeks. Since Leo refuses to stop investigating the outbreak of a drug called Foxfire, Bishop decides the least he can do is teach him to do it safely.
Older out of date sketches below. Still appropriate to his character but uuuuh, his design has gotten more refined since these.