Note: I don't RP / write for all of these, please ask!
Danganronpa [THH, Goodbye Despair and animes, I know minimal about V3] (I don't use DR characters but you're allowed!)
Who Killed Markiplier/A Date With Markiplier/A Heist With Markiplier/In Space With Markiplier etc.
The Iris Project
The Edge of Sleep
Tangled [+ SERIES]
Doki Doki Literature Club
Friday Night Funkin'
Animal Crossing: New Horizons
Pokémon (no specific season or game)
TMCs The Walking Dead
Inscryption
Resident Evil
Silent Hill
General Norse Mythos knowledge
Personal OCs, self-inserts and sonas