[@InkIsDorian]
Plot lines come and go but there is nothing at the moment. 
Any creature from any setting is fine, sometimes it gets a theme depending who was in there when others joined up but it really is limitless. Just have a look at some of the other characters. 

Just remember the 'Tavern' has ultimate power over any of the occupants. So if you do bring in a diety who tries to funk everything up I will just shut that characters powers down. Hasn't needed to be done so far though. 

Welcome.
Happy role playing!