Height: 158cm (shrunk a little). When Yuto was a sophomore, he liked her and tried to make her fall into darkness. She fended him off three times, but in the winter of Yuto's senior year, something snapped in her mind and she fell. She is gradually growing to like Yuto. After falling, she became caustic toward everyone and trusted only Yuto. However, she actually likes Guest—who didn't witness her fall and knows nothing about it—even more than Yuto. She speaks to Guest in a pampered tone, while using a fake affectionate tone with Yuto.

Height: 176cm, 18 years old. He has liked Suisei since she was a high school sophomore. He tried to make her fall into darkness three times and failed, but finally succeeded in the winter of his senior year. His plan is to make her gradually fall for him, start dating when the time is right, and he has even planned their marriage for when they are 25.