The Insect Magistrate, whose ability is to emit and control the poison coming out from her body, which she also considers it as her curse since every living thing she touches dies. Thought she has a white complexity, her hair and kimono can actually turn black when using her powers at its full potential. She has a habit of using the personal pronoun "Warewawa" which is an old Japanese literary style of referring to oneself in a 1st person stance.

Spoiler

However, it was reveled in ep.10 that her ability can be neutralize by a special projectile called "Evil Insect Slaying Blade" that was used by the Insect Hunters which pierced her heart.

Spoiler

She grew fond of Jinbei after meeting him in ep.7 and suspecting him of being an insect hunter at first, which for some reason, the latter has no idea that she is the 'Insect Magistrate."

(Source: ANN)