(First time posting here, would love any feedback or even ideas to expand this character)

This small kokeshi doll is 20cm tall, with a sailor suit pattern on its body and a plain face with a bob haircut painted on its head.

If you pick up this kokeshi doll and wait a few seconds, any pretty or beautiful girl will gradually transform into an inconspicuous figure with a bob haircut, black hair, obesity, and a plain face.

Furthermore, their athletic ability and academic intelligence levels all become average, and their past is altered to make them a person who has lived an unremarkable, ordinary life.

This cursed object is imbued with the resentment of a plain, overweight high school girl who, despite entering high school hoping to have a glamorous life, couldn't fit in and spent her days as an inconspicuous presence in her class, harboring jealousy for three years towards the popular girls who were at the center of attention. After the curse is activated, the pattern on the kokeshi doll changes to resemble the owner's appearance and the curse temporarily disappears, but after about a month the cursed power returns and it reverts back to its original plain kokeshi doll pattern