Naoko was teased at her middle school for being “weird”, it’s most likely that the reason she was labelled as weird was because of her giant red ribbon with her earrings, despite how much she’s been targeted, she refused to take off her ribbon.
When Naoko was crowned as The Pumpkin Queen, she put the pumpkin on her head, but it was a trap that Naruto set up by taking sulfuric acid and filling polyethylene bags with it, then taping them in the mask. When she placed the pumpkin on her head, the bags popped and melted her face.
Because of the serious injury, she was (imprisoned) in a mental hospital but later she killed more than 20 people, then wore a pumpkin head mask escaped from the hospital and sought a group of friends. Class. Level 2 for revenge.