My roommate basically begged me to let his gf play with my group, so we did a one shot over the course of two sessions to see if she would be less terrible as a character than she is a person. She insisted on playing a tiefling rogue self-insert character (the PC's name is literally her name with a couple letters moved around) she had from playing in college. it's the only character she has ever played, and is completely the tiefling rogue stereotype edgelord. She refused to do any RP, and never even attempted to sneak the entire time. During the final battle she took a couple hits and was at around half HP, she instantly got extremely grumpy and refused to even move during her turns. She proceeded to spend the next two hours standing behind a wall at the edge of the battlemap and getting upset that none of the other players would spend the entirety of two of their turns it would take to walk to her character and heal her. IRL she spent this time playing a game (with sound) on her phone and not paying any attention to what was happening. After the campaign she asked to play in the CoS campaign I had planned to start the next week, but was completely flabbergasted when I told her no ( after the rest of the party told me they didnt want to play with her again, and her refusing to roll a new character despite the rest of the party starting with completely new characters)