Question about appable characters! This isn't for me, but because I have a lot of friends who play characters like this, so I want to know if I should share Riverview with them.

Can characters app Original Characters created for a tabletop or LARP system? For example, Dungeons and Dragons, or White Wolf. These systems have a world that's already created, but there isn't a "canon" plot or characters, because as you play, you create those yourself. Some mods consider this to be fandom OCs, while others consider them just OCs.

Would these characters be appable in Riverview? I'm happy to expand more if you need!