He is voiced by Steven Blum in English Version.
He is a middle-aged ninja who wears an eyepatch on his right eye, a Byakugan he acquired from a main house Hyuga, and is often critical of Chōjūrō's indecisiveness due to his upbringing during Hidden Mist Village's "Blood Mist" days.
He is from the Hidden Mist Village and is one of the two body guards for the Mizukage Mei Terumī. He uses byakugan for only one eye because the other one was most likely damaged in war.
When Mifune suggests Danzo Shimura to lead the inter-village effort against Akatsuki, Ao reveals his Byakugan to confirm that Danzo's eye and arm belonged to Shisui Uchiha, whom he fought and aware of the Uchiha's ability to covertly manipulate others. Ao then goes after Danzo's group when they flee during Taka's attack, only to saved by Mei and Chōjūrō when he fell into a trap that Danzo's men set up in an attempt to retrieve his Byakugan. Ao serves in the Allied Shinobi Forces as captain of the Sensor Division stationed in the Shinobi Alliance Headquarters in Kumogakure, barely surviving the Ten Tails' Tailed Beast Bomb when it obliterated their base.
Boruto: Naruto Next Generations
He having been treated by Katasuke's scientific ninja tools over the years following his near-death experience, an older Ao had become a sleeper agent for the Kara. He engaged Team Konohamaru and Katasuke, using of the latter's inventions to kill his aide while wounded Konohamaru. A revenge-driven Boruto Uzumaki manages to outwit and overpower Ao, sparing the man's life as Ao ends up sacrificing himself to save Boruto from being crushed by Kashin Koji's Boiler Toad.
- Although, he is not from the Hyuga Clan he must have been tought that jutsu by a family member possibly.
- He appears in the two video games called Naruto Shippuden: Ultimate Ninja Storm 3 and Naruto Shippuden: Ultimate Ninja Storm Generatations as a support character doing a water release technique.
- He share same English Voice Actor with Orochimaru, Zabuza Momochi, Onoki & Chōmei.
- His English voice actor, Steven Blum is best known voicing as Seiichirō Aoki from X, Heatblast, Ghostfreak, Vilgax, Zs'Skayr from Ben 10, Amon from The Legend of Korra, Flamedramon, Magnamon, Raidramon, Pururumon, Poromon, BlackWarGreymon from Digimon Adventure 02, Guilmon, his digivolutions, Mitsuo Yamaki, Kenta Kitagawa from Digimon Tamers, J.P. Shibayama from Digimon Frontier, Falcomon, his digivolutions from Digimon Data Squad, Sago from Shinzo, Lord Darcia III from Wolf's Rain & Kyohei Kadota from Durarara!! series.