maybe to show that they are the semes..? I've never thought of that so I can't say. though I like the fang teeth. looks more beastly.
I think its Edward from twilight being reborn. Thats why the fangs pop out ╮(￣▽￣)╭
I just figured the fangs were a cute and funny way to depict his personality (though i usually see it when characters get into a chibi form accompanied by ears and a tail for obedience)
Fang's in japanese character designing is like giving them a much more rough and lively personality. If you watch One Piece you'd probably notice that characters will have shark teeth when they're yelling and stupidly angry.
Ok, I know this is probably a stupid question, but why does Sayama have fangs? I see them a lot on manga characters but it's never clear to me what they mean.
Oh, I was just told it's something they do in Japan to look cute, interesting. (They file their teeth to points.)