Ao

is a shinobi of Kirigakure, one of the two Kirigakure ninja selected to escort the Mizukage to the Kage summit.

Appearance
Ao is a middle aged man with an eyepatch over his right eye and wears two talismans on his ears. He wears a striped shirt and pants with seemingly the same pattern, with a robe over them. His hair bears a resemblance to that of Kisame Hoshigaki.

Personality
Ao believes that men should be tough and decisive, constantly scolding Chōjūrō for his pessimistic and weak demeanour. This attitude seems to be caused by his up-bringing during the times when Kirigakure was knows as the Blood Mist Village. He has a tendency of bringing up how things were done during those day, usually while fussing over Chōjūrō's behavior.

Five Kage Summit arc
He was setting off with Chōjūrō to escort the Mizukage to the Five Kage meeting, called for by the Raikage. There he scolds Chōjūrō for his indecisiveness.

After traveling for time, the small group stopped at an inn to eat and rest. After being told that the Fourth Mizukage's teachings are to be forgotten, by both the Mizukage and Chōjūrō, he yells at the latter for not being able to make up his mind as to what to order for dinner and sends him to get food.

Abilities
At some point in the past Ao had a Byakugan from a defeated member of the Hyuga clan transplanted into his right eye. His skill with it is notable, as he said that his eye saw through the illusion placed on the Fourth Mizukage, Yagura. With it he was able to detect that Danzo had had the right arm and eye of Shisui Uchiha transplanted into his body, and immediately recognized the chakra color emanating from those areas.