Mimi Kagari presents a mysterious figure, first encountered bloodstained and freshly returned from battle. Despite severe injuries, she radiates a cheerful, carefree demeanor. She wields unimaginable magical power, serving as her institution's secret weapon due to a unique form of immortality that allows revival even after injuries destroy her human form. Her abilities include potent offensive magic, deployed without hesitation against enemies. She becomes roommates with Sheena Totsuki, forging a complex relationship defined by their contrasting personalities and opposing views on war. Mimi displays apparent indifference toward conflict and killing, a stark counterpoint to Sheena's aversion to violence. This dynamic shifts as they grow closer, with Mimi expressing a desire to understand and adapt to ordinary school life. A significant aspect involves her healing ability: transferring mana through kissing repairs injuries. This leads to intimate moments, such as healing Sheena after a training incident, causing emotional confusion for her roommate. Mimi's background remains largely undisclosed, enhancing her enigmatic presence. Her development focuses on navigating relationships amid institutional demands and her mortality, with interactions revealing her cheerful exterior while underlying complexities emerge through her deepening bond with Sheena. Her appearance features waist-length pink hair, purple eyes, and a distinctive robe paired with fingerless gloves.