How about a weasel????
(I mentioned a weasel in with ermine and ferret. ^^; It works a lot better, though. Again, it’s more my associations as to why I don’t put it with Kaito myself. If I had to say why… well, without giving an example, they don’t feel as innocent? Not to say weasels are evil, or that Kaito is pure in many ways, but… Hmm. Even just trying to think of it, I associate weasel more with Spider than Kaito. Something about it doesn’t click completely with me.)