I honestly mean no offense when I say this but DUDE SCALE IT DOWN. The son of Satan would be considered a major player, that would be like asking to play a Knight of Hell. While the agency is okay with taking power where they can, mages, werewolves, vampires etc. there is no way in the seven circles of hell that they would allow THE SON OF SATAN on their team. Besides we've already got a minor demon turncoat and even that is a big deal.

Guys, just because you can play supernatural creatures doesn't mean that there would be no humans on the team. Humans with powers are fine but they should be a majority. And someone's going to need to come up with a commander for the team.

Really sorry if that sounded harsh it was just sort of my gut reaction.

And yes vampires don't age.