A 15 year old, hardworking, boy with superhuman strength, speed, and martial arts training, that was summoned to Geminar from Earth. He is the younger half-brother of Tenchi Masaki. It is later revealed that he was hypnotised by Washu Hakubi prior to his journey, and exhibits characteristics of Ryo-Ohki when startled. He's an incredibly skilled swordsman (Mexiah claims that he's better than she is), master martial artist (capable of safely catching thrown knives in mid-flight), and is a one-boy army inside of a Seikijin cockpit. His Seikijin is unique in that it is white. There is a clear mutual attraction between Kenshi and Yukine, and merely being in close proximity to each other can cause their cheeks to color.