Otone Hokke is the eldest of the five Hokke sisters, living in perpetual poverty after being abandoned by their deceased parents. To support her younger siblings, Otone works multiple part-time jobs, effectively becoming the family's maternal figure.

The sisters discovered an imp named Akumako sealed within a vase left by their father. Akumako revealed their parents belonged to an evil organization. Embracing their parents' wishes, the sisters formed the Gedou Otome Tai, a team of magical girls dedicated to becoming "excellent evil," with Otone actively participating alongside them.

Despite their commitment to villainy, the sisters' actions consistently backfire, inadvertently helping others and causing them to be mistaken for heroes. Otone shares in this recurring theme of mistaken identity.

Otone wields magical elemental powers specifically associated with water, which she uses as a member of the Gedou Otome Tai.

A notable character trait is her status as a "Big Eater," demonstrated by her capacity to consume ten bowls of noodles within thirty minutes. This aspect receives narrative focus.