Age: 40 (Part I), 42 (Part II)
Birthday: January 8
Weight: 146 lbs.
Blood Type: B
Hiashi Hyuga is the head of the Hyuga Clan. He is the father of Hinata and Hanabi Hyuga, twin brother of the late Hizashi Hyuga, and uncle of Neji Hyuga.
As the father of Hinata Hyuga and the uncle of Neji Hyuga, Hiashi has a significant role in the lives of his daughter and nephew.
Hiashi was born seconds before his twin brother Hizashi Hyuga, making him the head of Hyuga clan. The fact that Neji would never be able to succeed the clan, and that he would be marked with a curse mark so that he could be disciplined caused friction between the brothers.
When his daughter, Hinata, was kidnapped by a the Head Ninja of Kumogakure no sato, who was acting as an ambassador to Konoha at the time, he had no choice but to kill her kidnapper. The Land of Lightning overlooked the kidnapping, and they demanded a life for a life, asking Hiashi surrender his life and be killed, or else a new wave of warfare between the Hidden Leaf and Cloud villages. While Hiashi planned on accepting the punishment, his brother insisted on taking his place, saying that while he hated the main family, he wanted to save his brother and decide his own destiny. He asked Hiashi to tell Neji about his decision and his reasons before leaving to be killed.
Hiashi's general personality is very stern and strict, as he assigns both his daughters arduous training, rarely complimenting their performance. This is especially true with Hinata; when she was assigned to Kurenai Yuhi, he told her that he was unconcerned about the possibility that she would die, saying that the Hyuga Clan had no use for a weak successor.