Also known as: 関ヶ原瑛
A playable protagonist and pilot of Sentinel No. 11 in Juusan Kihei Bouei Ken. An amnesiac student at Sakura High School in the 1980s, constantly on the run from mysterious agents. Seen primarily as a loner, but tends to butt heads with and eventually warms up to Fuyusaka Iori. Is close to Shinonome Ryouko.
Wears a Gakuran similar to the Sakura High male uniform, but with a zipper instead of a set of buttons. Has short, Grey Hair, and Grey Eyes.