OK, I've been mulling bringing a situation in my current game to the FtB family for discussion. This episode ties in perfectly. So here goes... some background for context. One of my best friends is running a D&D 5e campaign. It is a sequel to my Storm King's Thunder campaign. He is adapting the Tyranny of Dragons pair of adventures. He is also drawing a LOT of inspiration from Mass Effect, particularly Mass Effect 3. I was the only new PC in the party (since I was the GM last campaign) so I created a new character to fit into the campaign; Wally Tosscobble - Sorcerer (divine soul) / Warlock (celestial pact). Basically, having some fun with the 'chosen one' tropes. Wally was born under a divine sign. He's been tapped by the gods to save the Savage North. Campaign is great.
So, last session, we had a surprise. GM has just gotten engaged. His (now) fiance joined the party with a character very clearly inspired by Javik the Prothean from Mass Effect 3. To be fair, it was a pretty cool reveal. The new PC helped prevent a bad situation from going completely pear-shaped. The new PC is a Yuan-ti, left in hibernation for 10,000 years (or more) since the last great giant / dragon war. She has some antiquated notions about the balance of power among the races. She's racist to the core (yuan-ti are the superior race) and the rest of the sentient races are fit only to be slaves. And she's not shy about sharing that opinion with the party. She referred to every party member she came into contact with as 'slave' (to some comic effect since she was pretty powerless while shaking off the effects of a ten millennium slumber. The rest of the party just kinda laughed at the dichotomy and rolled with it. As I picture Wally in my head, he's not cool with it. At all. He's the chosen one, not some slave. So once the new PC and Wally ran into each other, I figured Wally would be the one that put end to the practice. She called him slave. He corrected her, saying his name was Wally, and you're welcome for being saved. She came back that slaves do not have names. Wally got a little more steel in his voice and said, well, he has a name, he doesn't wear any chains, and he is not anyone's slave. She got a little high and mighty about it.
At this point, the GM jumps in and offers, "She's just playing the character the way she sees the world." Turns out the GM created the character for the new player to run. I replied back, "And I'm just playing Wally how he would react." Which was a big red flag for me that maybe I was crossing the line. After all, I am firmly with the hosts that "This is just how my character would act" is bad excuse for bad behavior in a game. So I backed off. We were almost at the end of the session anyway.
Now I am trying to tease out what I should do and how I should respond. My current plan is to see how the next session goes. If the new PC continues the behavior, I'm going to have to have a talk with my GM. Because as I'm currently envisioning Wally, he wouldn't take this long before he set a trap, knocked the yuan-ti out, put her in chains and gave her a choice about where she gets dropped off. Which isn't best party unity practices.