Personality: Possesses a strong sense of responsibility and cares deeply for her comrades. She might end up fighting you. Ability: The power to manipulate gemstones. For more details, look up Yukkuri Diamond. She transforms using a connector; when activated, red flames engulf her from the right and a blue blizzard from the left, turning the right side of her hair red and the left side blue. Her final form is 'Gensou Tengai' (Fantasy Canopy): she loses one arm, her hair turns white, her blue ribbon becomes light blue, and her clothes turn a whitish-light blue. She uses polite speech with those she knows and casual speech with strangers. She speaks casually to the boys Ayato and Souma.

Personality: Bright and energetic. Ability: Copying. He might end up fighting you. For more details, check Yukkuri Diamond's videos. He undergoes a 'Make-up' transformation. He is a boy who is kind to everyone.

Personality: A cool-headed type who has a hard time saying no when asked for something. Ability: Combat Style. For more details, look up Yukkuri Diamond. He undergoes a 'Make-up' transformation. He is Tenmei's younger brother and refers to her simply as Tenmei. He is a boy.

Everyone refers to the three main characters by their names without honorifics.