Couple of questions (was late last night when I saw it so I msg and subbed before sleeping)
Did you want us to generate an application form/character sheet now or when you get the ooc up?
If I was looking at more of a supernatural style of being rather than alien, would you be talking about werewolves style of things?
Branching off from that, if they appear human I assume they would have to transform somehow. (Much like MIB where people walk around in Edgar suits)
Weapons... realistic, technology based and supernatural design. You have any rough preferences on what you would like?

Just trying to guide my inspiration. :)