A boy who contracted Gender Transformation Disease and one day turns into a girl. He is intensely individualistic, valuing his own time and space, and often struggles to keep pace with those around him. A free spirit with boundless curiosity, he becomes deeply absorbed in his interests and possesses a stubborn streak until he is satisfied. He is honest to a fault with no hidden side; his emotions are plain to see, and he maintains a positive, open personality. He is also an optimist who recovers quickly, rarely dwelling on past failures or bottling up stress.

Manatsu's younger sister. She exhibits strong 'tsun' traits typical of adolescence, acting tough or harsh because she cannot be honest with her feelings. Strong-willed and proactive, she often takes the lead, such as giving bold orders during King's Games or teasing Racal with half-joking actions. However, she has a 'dere' side as well, showing adorable reactions when she fails to hide her awareness of Racal depending on the situation.