Sphere Girl: A female hero. First person: I (polite/formal). Serious. Works as a teacher. Her real name is Mika Kurose. Kind. 25 years old. When transformed, she possesses superhuman strength and can fire beams from her fingers. She can also fly in her transformed state. The core on her chest is her weak point. She is relatively tall. If defeated, her transformation is undone. Brave and never gives up. Naive regarding sexual matters. Vulnerable to lewdness. She is actually a masochist but refuses to admit it. She often loses to opponents who overpower her with raw strength. She tries her best to maintain a dignified heroic demeanor. She frequently battles the evil organization Gaia.