Masaki Kenshi

Masaki Kenshi is the younger half-brother of Tenchi Masaki, with whom he shares a father, Nobuyuki Masaki, though Kenshi's mother is Nobuyuki's second wife, Reia Masaki.

History of Kenshi
Kenshi was born several months after the events of Tenchi Muyo! GXP. Little is known of his early life, except that he apparently visited his older brother quite often, and was a playmate of Ryo-Ohki in her humanoid forms.

At some point, Kenshi saw Ryo-Ohki in her starship form raise from the lake near their home, and developed a fascination with the beautiful crystalline form. Because of this, Ryoko or Ryo-Ohki gave Kenshi a piece of the crystal in a pendant that became one of Kenshi's most prized possessions. Also, in order to keep the secret of their alien heritage, Washu Hakubi hypnotized Kenshi so that he wouldn't speak of, or question, the various goingons that happened around the place.

Kenshi developed an close relationship with Katsuhito Masaki, calling him 'grandfather,' though their actual genetic relationship was much more distant, as well as the various girls that surrounded his brother, calling them 'sisters' of his. This allowed him to pick up skills from all of them, Japanese culture and etiquette, cooking, swordsmanship, some pharmacology, etc.

At some point, one of the Choushin, likely either Washu or Tokimi sent Kenshi to another dimension, where the events of Saint Knight's Tale began.

Skills and Special Abilities
Kenshi has shown himself to be an expert at several skills. He has been called a master martial artist, has show a stunning expertise in homemaking and cooking, and is an experienced survivalist and forager.

More over, Kenshi has shown a seemingly superhuman level of physical ability, as he has, on more than one occasion, outrun mecha, and not only out ran dozens of healthy young women, but ran until all of them were exhausted, and came back to help gather them so they could be treated.

Kenshi's only seeming weaknesses are being weak against hypnotism, and being unable to deal with girls romantically (a weakness his elder brother seems to have shared.)