Tatsuta Ootori

As the unassuming leader of the Kashinokidai High School art club, this second-year student prefers to blend into the background and avoid any unwanted attention. However, his quiet life changes forever after a shared cleaning duty leads him to discover Luna’s supernatural secret. Now acting as her dedicated practice partner for blood-sucking, he has stepped into an unexpected, nurturing role, essentially becoming the "Mama" figure in her chaotic existence.