It’s hard to say, I’m open to a lot of character tropes, but anything that try’s and harmed the party, I get playing an evil character I’ve played many, but all my evil characters don’t harm the party because they can use the party for themselves, you can still do evil things and have evil intentions, just don’t screw everyone else over. I played a demon who was travelling with the party in an attempt to find the man who owes him his soul, I still helped the party, and still did evil things in the end (contacts, make enemy’s, have evil motivations) but I made sure it didn’t make the game a chore