is miles/tails a boy or a girl he/she is to girly?

Answer 1

You'd probably have to look under the tails. I've found that being girly doesn't actually make you a girl. I vote boy.

Answer 2

Not as much girly as effeminate. Maybe it's how young he is, maybe he has less testosterone, or maybe it's because he's a fox (foxes are often associated with women).

I wouldn't try to think on it too much if I were you.