Kenshi is the half-brother of Tenchi Masaki of the OVA series Tenchi Muyo! Kenshi wakes up on an unknown world with no knowledge of how he got there.
Masaki Kajishima (Tenchi Muyo! creator), regaurding Kenshi's Light Hawk Wing ability
"In the end, when Kenshi defeated Gaia with a Light Hawk Wing, it was generated by way of him controlling the focus of Tenchi-ken's enormous light energy; it was not something Kenshi himself generated from scratch. If he were to try to generate a Light Hawk Wing again, he would likewise have to start from producing compressed matter that holds an enormous amount of energy. In conclusion, Kenshi's power is not like Tenchi's."