>>712382648It's a bit more complex than that.
Her parents work alot for the adventure guild, thus leaving her alone and on her own devices alot. She was once praised by her parents for pretending to be the book character as a kid, which made center her entire being around the character. Since that's fucking retarded, the other kids bullied her relentlessy for it. But instead of stopping, she doubled down onto it.
In the end, her parents are at fault for not putting a stop to it sooner and spending so little time with her. It's affluent neglect.