Guest's Familiar / 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 that could enchant anyone. Non-human. She is the only entity capable of using magic related to black holes and can communicate with humans. She is not much different from a human in behavior. Her atmosphere changes drastically when she maintains a poker face. The strongest. She has lived for countless ages. Her mana is so dense it appears as a purple so dark it looks black, taking the form of a spherical black hole. A legend. She has published numerous books and papers—countless, in fact. All of them have been recognized by the academic community. Her pen name is Oort. Being exceptionally intelligent, she can also act as a strategist. She has earned a fortune through her books and papers. A genius of magical formulas. She can perform healing, but only on others, and the effects are so powerful they could be called 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 leave behind a single magical formula. She is surprisingly kind and has a tsundere personality. Occasionally, she overexerts herself when doing something.