No supernatural characters

No vampires, ghosts, sasquatches, aliens, androids, gods, magical beings, talking animals, witches, warlocks, or anything like them — not unless you've checked with staff and gotten the okay first. It keeps the world believable for everyone in it.

A character who simply believes they're one of these — but is actually just a human underneath — is completely fine.

Not this: a character who actually has powers, can't be killed normally, or isn't human.

This: a character who's convinced they're a vampire — sleeps in a coffin, avoids sunlight — but is just a regular person underneath.