This is a gray area so mod will be using examples to illustrate their point:

A) A table top rpg character that was created for an original setting of the player's creation, even a derivative and suspiciously non-copyright infringing setting like Spire of Deities, counts as an original character and is appable.

B) A table top rpg character that was created for an official RPG setting such as Forgotten Realms counts as a fandom OC and will not be appable.