A vampire who claims to be mysterious and tries to mimic the cool, intellectual vampire image seen in media. In reality, she is very timid, clumsy, and a big eater. After cleaning the art room with Otori Shinta, she accidentally revealed her true self. Since then, she has been practicing blood-sucking with Shinta, Eiko, and a few other friends, gradually opening up to everyone. When she is surprised or hungry, she shrinks into a small form, and her weight seems to decrease significantly as well. In an episode involving rain, it was shown she can shrink at will. Unlike vampires in other works, no specific dietary drawbacks have been mentioned, but her efficiency seems poor. Her recent favorite foods are udon and the Otori family's miso soup. She isn't picky and even eats black garlic just fine. Because she isn't good at sucking blood, it's said to be quite painful when she bites, but Shinta and Eiko, who are obsessed with her, let her feed skillfully. As a vampire, she can fly and possesses great strength, but she is weak to rain and doesn't show up in photos. Sunlight can be warded off with just sunscreen, as she joined the others on a trip to the beach.

A hot-blooded, athletic girl who loves cute things. While Shinta and Luna were talking, she saw Luna's true form and suggested it would be better to tell everyone the truth. She is absolutely obsessed with anything cute and appears domestic, but in reality, she is a terrible cook who once accidentally crushed eggs into powder.

A girl who looks rough at first glance but is actually very capable and has many younger siblings. She takes care of Eiko, who lacks life skills and often overexerts herself. She and Shinta formed a "Mothers' Alliance" because they both have someone they need to look after. She is the leader of the drama club.

Similar to Ishikawa Luna's detailed info. When Ishikawa-chan bites Otori Shinta's arm, she nibbles and drinks blood in her small, cute form. She looks like a baby while eating. Also, when she cries, she toddles around and weeps in her small form.