Yukio Okumura

Yukio Okumura is Rin Okumura's twin and younger brother and the adopted son of Shiro Fujimoto. He began Exorcist training at seven and became a Middle First Class Exorcist, earning the Dragoon and Doctor titles at only fourteen. Regarded as a prodigy, Yukio is also the youngest teacher at the True Cross Exorcist Cram School, where he teaches pharmacology. He is friends with Shiemi Moriyama, who calls him Yuki-chan.