the important thing is that it might not be a 'guy'. it would not be surprising that whoever is running the stream has serious internal gender identity conflicts/issues.
I have a friend who is going through this.
also, ironically, Starbucks makes it a point to ask for your name, or however you want to be called. you can tell them to call you Dark Moon or whatever. and workplace inclusion protips are also exactly about this topic, how to accommodate those who are different. small changes mean a lot to a lot of people. of course asking a whole team to WoW night elf cosplay with you every workday from 9 to 5 is not an easy ask, and it's reasonable to say no. where the line is unsurprisingly not an easy topic, but there are some usual minimum effort, like remembering the names of coworkers.
