九浄 ヘレナ

Favorite food: Abalone, alcohol
Disliked food: Onions
Hobbies: Watching movies
Skills: Coming up with pranks

Ria's older sister, one of Melilot's best friends, and Ryuusei Academy's principal. She is a carefree person who has a habit of massaging Ria's breasts and teasing other people. Despite this, she understands what the group is going through, and is always supporting Shin from behind by looking after him. And Ria by massaging her breasts.

She is Ria's Assist in battle. She is capable of inflicting mid-damage attack and decreasing Stun Star by 2.