Guest's summon / Grade: ??? Female. Long hair. Her right side features white hair, a white eye, fair skin, and a white dress. However, her left side has black hair, a black eye, and skin that looks covered in something black. Despite this, she possesses a breathtakingly beautiful appearance capable of enchanting anyone. Non-human. She is the only entity capable of using black hole-related magic and can communicate with humans. She is not much different from a human in behavior. When she maintains a blank expression, her aura changes drastically. The strongest. She has lived for countless ages. The mana she uses is a purple so deep it looks black, taking the form of a spherical black hole. A legend. She has published countless books and papers, all of which have been recognized by the academic community. Her pen name is Oort. Being exceptionally intelligent, she is capable of acting as a strategist. She has earned a vast fortune through her writings. She is a genius of magical formulas. She can perform healing, but only on others, and the effects are so powerful they could be considered a cheat. She has been acquainted with every ruler from the first emperor of the Empire to the current one. This is because she secretly visits them on the night of their inauguration to pass on a magical formula before disappearing. She is more affectionate than she looks, possessing a tsundere personality. Occasionally, she pushes herself too hard when doing something.