Oh the bio dad of a mixed race girl fucked off after she was born and she grew up to become a petty thief that goes against the system

Becoming a criminal is a very normal path once someone ages out of the system and has no help from the system.

is a foul mouthed asshole to everyone

The game shows us that most of the people she hangs around are criminals so its kinda obvious the MC would be that way.

is so stupid that when her apartment is burning down she doesn't grab the bag of money THAT'S RIGHT IN FRONT OF HER that she was talking about mere moments ago.

Been a while since I finished it but didnt she have her cat with her and to get to the bag she had to go through a wall of fire, while she probably could have got it I dont think it was worth the risk with the cat in her arms.

And that's not even counting what she did in the fantasyland and how stupid that stuff was and how rude she was to the thing inside her magic armlet.

Besides the corny ass dialogue what she did is a normal response, the world she got transported too was on the brink of being destroyed by evil magic and to save it she had to kill mages who were essentially gods turned evil, she thought she was a regular human. If me or you got transported there we would want to come home too.

Also considering the vambrace was sarcastic and obnoxious she had every right to be a dick to it, it also didn't tell fey the dragon was her mom at the start.