Beyond alien powers at first, a Queen after mutation who knows. Your more likely to be turned into a telepathically fucked over double-agent at some point after a period of sexual use to break you down mentally and ,er, emotionally.
Its not just telepathy aliens are unique physiologically kind of like Homeo Sapiens were to Neanderthals, a 2% genetic difference.
As for sides we need:
Alien - Queen
Alient - Infiltrator
Alien - Technologist
Human - Agent (filled)
Human - Special Ops (of some sort a former terrorist, recruited agent from spy agency or appointed to the role - all the BIG 5 powers have a say so you could be KGB or MI6 or other)
Human - Scientist (mad or not its up to the player)
[like at least one woman]