Been thinking on it, and I think Kaito's is a Raven but I'm not too sure on that. A bird, for sure. Eagle? Not a dove, though.
One of his funnier boggarts would be a fish //SNORTS
A character can have multiple fears so I imagine they could have multiple boggarts, but LETS TALK ABOUT WHAT THEY ARE AND HOW THEY WOULD BANISH THEM
... i have no idea how kaito would banish that boggart tbh he'd be screaming and crying in the corner-- probably have a dog eat it but then again //laughs
One of his more serious ones would be Aoko not accepting him for who he is; and another one would be Nightmare and Spider, I guess. Hmmm. Need more thought in this.