Yuuki, Keisuke

夕城圭介

Keisuke is Miaka's older brother. He is extremely protective of Miaka and consistently considers what is best for her. Initially, upon hearing Miaka's account of The Universe Of Four Gods, he struggled to believe her; however, to be safe, he instructed her to stay away from the book. Despite this, Miaka went, and he pursued her. He only believed the story after witnessing her disappear into the book. Throughout a significant portion of the anime, he is the one reading the book while simultaneously attempting to determine how to help her return to the real world.