To clarify, it's fine if other characters don't know about each other in detail.  It's entirely possible that somebody gave you a photo with a name and pantheon, suggested you two might want to meet up, and then you never actually found each other.  You might just as well have been childhood friends, or met in a bar last week and are still sharing a hotel room together.<br/><br/>Whatever you come up with, pitch it to the other player.  If they agree to it, it's canon.  If you get pitched something you don't like, suggest things to change it that can work.  It'll just work out better than having everyone not know each other at all, I think, or just saying that you all know each other but without any explanation of how or why.<br/><br/>Up to the two of you how much you know about each other's powers and abilities.<br/><br/>After we've had a few people meet up, preferably have folks reach out to some of the others.  You aren't forced to have only ONE meetup, and I'll okay it if you want to have something for EVERYONE.