ミダリ

A succubus with a childish body. She attends a reform school for succubi who lack sex appeal, that trains them into Succubattlers. She and her friends tend to behave like delinquents, and pick a fight when they hear about the Dungeon.

Due to her low self-esteem from always being considered a failure as a succubus, she is extremely weak to praise, and quickly falls for Kazuto's sweet talk, agreeing to join his forces.