None really except don't be op
Yuri and Yaoi is OK
Spirit x mortal can happen I don't mind.
You can have an adult oc just tell me if their still single married divorced etc
You can be in training for magic but like for me the only magic they know is from their mothers or if a Yuri and Yaoi relationship the submissive of the couple (I'll explain further in)
(People who may be interested)
BeingCrazyIsOkIThink
Artemisss9
And
Fanfiction556
(They will also help me keep track of the rp so their my right hand people)
