Sure you can join, [@Nate1008]. As for your questions:

1. I'm going to say no to this if only because it'd give your monster a bit of an advantage if they can just make an army for themselves. If you give us a number limit to how many, I might reconsider it, but for now it's no.

2. Yes and no; that depends on how "new" your GMG is. If they're just now appearing on Earth, then they wouldn't have a disguised form yet for obvious reasons. If they've been on Earth for a while now, they'd have a disguised form to hide among humans.

3. Up to you.