Ao

Biodata

Background / History

Service under the Fourth Mizukage

Ao lived through Kirigakure’s Bloody Mist era, when heavy casualties and harsh treatment of comrades were commonplace. He continued to regard its deadly competition as a means of identifying talent and awakening potential, despite Mei Terumi’s rejection of those methods 124 164.

At Mei’s direction, Ao used his Byakugan to detect and dispel the genjutsu controlling the Fourth Mizukage, Shikura. This brought Kirigakure a brief period of peace before Shikura’s death left the village without a leader 90.

Wave Island Campaign

Ao accompanied Mei’s expedition against the Funato Clan, a campaign intended to establish her credentials as Fifth Mizukage. During preparations, he openly criticized the Land of Sea’s Daimyo for fleeing with every stationed Kirigakure ninja while leaving his subjects exposed to the pirates. As the fleet approached Wave Island, Ao detected five especially powerful defenders, including one whose chakra matched Mei’s 123 124.

At the Funato palace, Ao stayed behind to fight Funato Aopon while Mei confronted the clan leader. He defeated Aopon but suffered a shoulder wound from her chakra arrows, later crediting his Byakugan with keeping him alive 125 128 129.

After Mei restrained Funato Daika, Ao proposed containing him in a sealed vacuum cage to prevent moisture from restoring his body. Mei ordered a transparent vacuum tank prepared and entrusted Ao with the remaining operation. He organized searches, protection for the barrier team, and the transport of the Funato widows, whom Mei had ordered spared 129.

Despite his injury, Ao personally returned to guard Daika. His Byakugan revealed that the captive’s chakra had stopped flowing and that he was dead. Following Aopon’s unexpected revival and the Funato women’s escape, Ao reported both developments to Mei, who ordered Daika’s body brought back with the barrier intact 130 131.

The Land of Sea Conspiracy

Upon returning to the Land of Sea, Ao disproved the former Daimyo’s claim that the celebrating villagers were disguised Funato pirates: their chakra showed that they were untrained civilians. He also detected two formidable chakra sources belonging to Xia Yu and Uzumaki Honoka 137 138.

Ao participated in the concealed plan to dissolve Mei’s marriage alliance with Xia Yu and attack the Land of Sea. He believed that he and Chōjūrō could occupy the pregnant Orochimaru while Mei and Kirigakure’s main force fought Xia Yu. However, intelligence gathered at Mei’s request revealed Xia Yu’s background and strength, prompting the Land of Water’s Daimyo to cancel the attack. Ao secretly visited Mei that night to relay the decision 144 145 146.

Kaguya Clan Rebellion

During the Kaguya rebellion, Ao and Chōjūrō confronted Kimimaro after he slaughtered nearby Kirigakure ninja. Ao attempted a rear attack but was struck by ribs emerging from Kimimaro’s back. Already depleted by days of fighting, he then used his Byakugan to confirm that Chōjūrō’s strongest chakra blast had failed to injure the boy 164 165.

Recognizing signs of the Kaguya Clan’s hereditary illness, Ao switched to attrition. He repeatedly created water clones while Kimimaro exhausted himself destroying them. After Kimimaro collapsed, Ao ordered Chōjūrō to finish him off, rejecting the younger ninja’s suggestion that the child could be rehabilitated 165 166.

A concealed figure rescued Kimimaro underground, using an independently moving sword to obstruct Chōjūrō. Ao tracked the rescuer and led Mei in pursuit, but eventually fell from exhaustion. Mei called off the chase rather than push her depleted forces further 166 167.

Return to Kirigakure

After the rebellion, Ao volunteered to help Mei plan the village’s reconstruction instead of going home to rest. Near the Mizukage Building, he detected two airborne chakra sources stronger than Tailed Beasts and recognized one as Xia Yu’s. The enormous woman accompanying Xia Yu initially startled Ao and the villagers 170.

Ao later reminded Mei that villagers were watching her embrace Xia Yu and asked about the postponed reconstruction work. He also attended the meeting where Mei announced her pregnancy and the Uchiha Clan’s proposed admission to Kirigakure 172 174.

Battle against Akatsuki

Ao and Chōjūrō confronted Kisame to reclaim Samehada and prevent him from reaching Mei. Their coordinated Water Release attacks initially held him off, but Ao’s genjutsu failed, and Kisame eventually trapped both men in an enormous water prison. Ao urged Chōjūrō to release Hiramekarei and reminded him of his promise to protect the pregnant Mizukage 254 256 257.

After the Raikage intervened, Samehada escaped underwater. Ao pursued it with his Byakugan while sending Chōjūrō to protect Mei. As the Five Kage moved against the Demonic Statue of the Outer Path, Mei ordered Ao to summon every available reinforcement; Tsunade additionally instructed him to have the sensory unit locate Xia Yu 257 258 260.

Personality

Ao is stern, outspoken, and prone to comparing younger ninja unfavorably with his own generation. He criticizes Chōjūrō’s timidity and Mei’s gentler treatment of him, repeatedly invoking the Bloody Mist era until Mei rebukes him. Nevertheless, he takes genuine satisfaction in Chōjūrō’s growth under pressure 124 164 166.

His loyalty to Mei is expressed through practical support: assuming command when she is exhausted, personally guarding a dangerous captive despite injury, and offering to share reconstruction duties after prolonged combat. His concern for civilians also leads him to openly mock the Land of Sea’s Daimyo for abandoning his people 123 129 130 170.

Ao is ruthless toward enemies. He exploits Kimimaro’s illness, insists that mercy is a wartime mistake, and considers the boy’s body too valuable to lose. His confidence can also exceed his information: before receiving Xia Yu’s intelligence report, he strongly supported an attack that the Daimyo subsequently judged too dangerous 144 145 165 166.

Abilities & Skills

Chakra Sensing

Ao commands Kirigakure’s sensory division and is described as arguably possessing the village’s strongest sensory abilities 124.

• Detects enemy concentrations and compares their chakra strength, identifying five major defenders on Wave Island before landing 124.
• Tracks a concealed opponent fleeing underground 166.
• Recognizes Xia Yu by his chakra signature and detects powerful arrivals approaching from the sky 170.
• Conserves chakra for sensing when direct combat becomes impractical; he explicitly regards frontline fighting as outside his specialty 166.

Byakugan

Ao possesses a Byakugan in his right eye, activated by gathering chakra and forming hand seals 165.

• Genjutsu detection: Sees through and helps dispel the control imposed on the Fourth Mizukage 90.
• Battlefield vision: Evades attacks from blind spots, helping him survive Aopon’s fast chakra-arrow barrage 129.
• Chakra inspection: Distinguishes untrained civilians from ninja and identifies Honoka’s enormous but disordered chakra 137 144.
• Condition assessment: Detects the absence of chakra flow in Daika’s body and monitors Kimimaro’s deteriorating condition 130 165.
• Limit: Requires chakra to maintain. After prolonged fighting, Ao becomes unable to sustain it 166.

Water Release

Ao uses Water Release for both coordinated attacks and diversionary tactics 165 256.

• Water Dragon Bullet Technique: Covers Chōjūrō against Kisame, although Kisame cuts the dragon apart with Samehada 256.
• Water Clones: Conceals his real body among duplicates and forces Kimimaro to expend energy destroying them 165.
• Combined attacks: Coordinates repeated Water Release techniques with Chōjūrō in an attempt to trap Kisame 256.
• Limit: Kimimaro destroys his clones faster than he can replenish them; the tactic succeeds by exploiting the boy’s illness and exhaustion rather than overpowering him 165.

Genjutsu

Ao can cast genjutsu using one-handed seals, attempting to control an opponent’s will 256.

• Uses it against Kisame while Chōjūrō attacks 256.
• Kisame immediately breaks free and dismisses Ao’s technique as inferior to Itachi’s 256.

Command and Tactical Analysis

Ao takes operational command when Mei is unable to continue and adjusts tactics to enemy weaknesses 129 165.

• Proposes vacuum containment for Daika after learning that moisture enables his regeneration 129.
• Organizes island searches, prisoner transport, and protection for the sealing team 129.
• Recognizes Kimimaro’s hereditary illness and changes to a battle of attrition 165.
• Directs Chōjūrō’s priorities during combat, including releasing Hiramekarei and returning to guard Mei 256 257.

Equipment

• Kunai — Used in an attempted rear attack against Kimimaro 164.
• Kirigakure forehead protector — Bears the village’s four slanted wave marks; Kimimaro identifies Ao’s allegiance from it 164.

Relationships

• Mei Terumi — His Mizukage and trusted superior. Their exchanges are often sharp, but she relies on him for intelligence, command, and sensitive missions 124 129 145 170.
• Chōjūrō — Junior colleague and frequent combat partner. Ao lectures him on courage and judgment, encourages his growth, and coordinates closely with him in battle 164 166 256 257.
• Shikura — Former Mizukage whose controlling genjutsu Ao helped dispel at Mei’s direction 90.
• Uchiha Xia Yu — Initially a target of Kirigakure’s planned attack. Ao investigates him, recognizes his chakra on later encounters, and is eventually tasked with locating him to assist the Allied Forces 145 170 260.
• Funato Aopon — Opponent defeated during the Wave Island assault. Her arrows injure Ao’s shoulder, and her later revival overturns his assessment that she had died 129 131 151.
• Kimimaro — Enemy whom Ao defeats through attrition and orders executed before an underground rescuer intervenes 165 166.
• Kisame Hoshigaki — Former Kirigakure ninja whom Ao condemns for killing Suikazan Fuguki, stealing Samehada, and joining Akatsuki 256.

Notable Quotes

“Lady Mizukage went to great lengths to capture the Funato Clan’s leader. Nothing can go wrong. I wouldn’t feel reassured sending anyone else...” 130

“Showing mercy to an enemy is the most foolish mistake you can make in war! Especially with the Kaguya Clan!” 166

“I don’t want you to shoulder all that work alone. Take me with you. I’ve got some brains, at least, so I can help ease your burden a little.” 170