The male protagonist. A high school boy, talented in kendo with serious personality who has a somewhat dark past and cold relationship with his family, and, due to certain circumstances, forms a fake relationship with his childhood friend Kurumi. For some reason, since around middle school, he doesn't dare to call her "Kurumi" anymore, instead resorting to "Isoshima-san", which is too polite for their long-term acquaintance. Their relationship is one of the main conflict sources between him and Gekkou, his younger brother. He gained evasive magic after Mui turned him to a magician. His Aspect (a tool that acts as a focal point through which magicians project their power) is a sword that has the height and weight of a kendo sword, named "Twilight" by it's previous owner.