Ko Hyuga

Ko was Hinata's caretaker for many years and it was his duty to watch over her whenever she was not in the academy. He showed great care and concern for Hinata's happiness and well being. He was very sad whenever Hinata was disheartened.

Ko used to tell her not to mingle with Naruto as he was a jinchūriki. He once accidentally mentioned the Nine-Tails and Hinata questioned him about it and Ko evaded answering it by saying that it's something that she doesn't need to worry about.

He even accompanied Hiashi to rescue Hinata after she was kidnapped by Kumo Ninja. He also aided Tenten in defeating the mud-wolves. During Pain's attack on the village, when Hinata went to help Naruto, he tried to stop her as he was responsible to protect Hinata during her father's absence. However, he couldn't stop Hinata as he had broken a leg when Pain had used Shinra Tensei on the whole village.

Jo has brown hair with spikes and he had white eyes and a broad, well-defined nose. He wears the standard Konoha uniform with the green flak jacket and forehead protector which he wears like a bandana. He also wears the Hyuga clan's black kimono.

As he is incharge of taking care of both Hanabi and Hinata, it indicates that he is a skilled shinobi. He possesses the Byakugan which grants him 360° vision and they give him the capability to see through solid objects too.

Ko Hyuga not only appeared in the series but also a movie.

Movies

Road to Ninja: Naruto the Movie

Q. How is Ko related to Hinata?

A. Ko is Hinata's caretaker.

Q. How old is Ko?

A. At the start of the series Ko was 19 years old.