How is she a bitch. She's done nothing wrong so far. Doesn't know anything about his family situation so how would she know if her question is insensitive. didn't hurt the mc in any way yet. She's just acting like an average girl around her crush. Doesn't belittle him or his friends or think they are beneath her or something. Her own friends seem chill too. I feel like you're only saying this because she's not the main girl. Obviously this may change later on but rn she's done absolutely nothing to warrant being a bitch. Bastard just seems to be a common way to refer to literally anyone in korean stories.