Hanabi Hyūga

is a member of Konohagakure's Hyūga clan.

Background
Since Hanabi was considered more powerful and confident than her older sister Hinata, their father Hiashi, decided to focus his gruelling training regime on Hanabi instead of what he considered to be, wasting his time on her sister.

Appearance
Hanabi has dark brown hair with long bangs, and white eyes, a common trait shared by all Byakugan users. She was seen wearing an armless blue v-neck shirt with a mesh blouse underneath and blue shorts.

Personality
Hanabi's character has not been expounded on in the manga or even the anime very much. From what is noted of her appearance in various media (such as Naruto video games), Hanabi seems to be a quiet, polite and respectful girl, although she seems to open up to people a bit easier than her sister. Unlike how Hinata once was, Hanabi is more confident in her abilities.

Abilities
Relatively nothing is known of Hanabi's skills other than during the Chūnin Exams that Hanabi possesses a stronger Byakugan than her sister's but weaker than Neji's. In the anime it was shown that she is very skilled with taijutsu even at her young age as she was able to knock out Hinata in a sparring duel between them once. It can be assumed however as a wielder of the Byakugan that she has near 360° of vision as well as the ability to see through objects amongst other ocular abilities granted by the eyes.

Chūnin Exam Arc
Hanabi watched Neji's match against Naruto during the final round of the Chūnin Exams with her father, and was amazed to see that he had learned powerful secret techniques on his own. It was also indicated that she knew nothing about the failed attempt to kidnap Hinata that had resulted in Hizashi's death, mostly because she wasn't born at that time, as she did not know how her father could still be alive after the Land of Lightning demanded his death.

Pre-Shippūden Filler Arcs
Hanabi appeared two more times in the anime; at the funeral of the Third Hokage and at Tsunade's inauguration as the next Hokage, standing with her cousin Neji and his team-mate Tenten.

Invasion of Pain Arc
Although she didn't make an actual appearance, Hanabi was seen in a flashback sparring and overcoming Hinata, much to Hinata's dismay. She is noted to be away with her father during Pain's attack on Konoha.

Trivia

 * "Hanabi" means "fireworks".
 * As the younger sibling, there is a possibility she will be placed in the Branch Family and receive a Cursed Seal, once the next heir turns three. However, because her father felt that Hanabi was a more suitable heiress than Hinata, and because there have been several changes in the way the Hyūga family works, it is possible she might be exempt from this.
 * Since she is a girl, it is also possible she was never meant to have a Cursed Seal in the first place, as Japanese tradition usually only allows men to start a branch family.