Kendo is a very large, muscular man with long, light-colored hair.
His face is hidden beneath the plague mask given to him by the Shie Hassaikai, and he dons a tattered t-shirt and dark pants covered by a light tunic and decorated with two belts. Kendo also sports his signature gloves, which cover his hands with several leather straps and his knuckles with metal.
Kendo is a very hot-blooded man who thrives on violence and bloodshed. He has a warrior-like mentality and all he cares about is seeking out a battle that can satisfy him. Kendo believes it's unbecoming for a fighter to use weapons and that everyone should fight with the power of their bodies.
Unlike most of the Eight Bullets, Kendo only serves Overhaul because he hopes to one day defeat him. Kendo's entire mindset revolves around provoking others into a fight to the death where he can stake his life on the line. If someone cannot satisfy that interest, Kendo wants nothing to do with them. If someone can give him the thrill he seeks, Kendo shows them great respect.
To a certain degree, Kendo appears to have his own sense of honor. He would rather fight alone and win with his own strength than fight alongside Hekiji Tengai. Kendo also allowed Fat Gum to take Eijiro Kirishima to heal so they can fight again sometime.
Kendo used to spend his days fighting in an underground fighting ring. He did as a rebellion over his strict parents. In that fight club, fighters could go berserk with their Quirks. Kendo's battle prowess made him too powerful for all his opponents and he never got the deathmatch he always desired.
Kendo joined the Shie Hassaikai with the sole intent of fighting Overhaul. He has been killed all five times he's challenged Overhaul.
During the raid of Overhaul's hideout, Kendo is paired with Hekiji. When Joi Irinaka launches Fat Gum and Eijiro into another room, Hekiji and Kendo are already waiting for them. Launching a barrage of punches, Kendo manages to break through Eijiro's Red Riot Unbreakable. Taishiro tries to punch Kendo, but Hekiji protects his partner with a Barrier.
Kendo complains when Hekiji stops him from attacking Taishiro, to which Hekiji reminds him that Overhaul paired the two up because their Quirks have great synergy. Kendo replies by trying to attack Hekiji, which he blocks with his Quirk. A confused Hekiji asks Kendo what he is doing, to which Kendo replies that he does not care about Overhaul's plans and that he only wants to kill. Hekiji decides to let him do as he pleases, while also reminding him to address Overhaul properly.
As Taishiro prepares to fight back, Kendo orders Hekiji not to interfere, to which Hekiji assures him that he will not. Upon seeing Eijiro's fear, Hekiji notes that he has already given up and expresses pity for the young hero. After Kendo is done assaulting Taishiro, Hekiji notices that Taishiro is preparing for another counterattack and tells Kendo to finish things quickly. As Kendo tries to finish Taishiro off, Eijiro interferes, taking his attacks and attempting his own counterattack; however, Hekiji blocks it with a barrier. Hekiji simply notes how meaningless it was for Eijiro to take these attacks.
Soon, however, he realizes that Eijiro's actions were not in vain as Taishiro emerges from the dust and releases all the impact he stored from Kendo's punches with a single powerful blow. Hekiji however creates a barrier with maximum defense that absorbs most of the impact, which prevents the two from being knocked out. Kendo stands up again and claims that it is a fight to the death and he is not dead yet. He asks Taishiro to take Eijiro to the next room with first-aid supplies. Hekiji questions the selfish attitude of Kendo and demands that he follow his orders, but Kendo knocks out Hekiji by stomping on his chest and declares that he wants a fight to the death against Eijiro.
After treating Eijiro's injuries, Taishiro asks about Kai's plan and the reason Kendo is following him, so Kendo tells him that he is only around to defeat Kai someday and that Kai wants to reinstate the Yakuza.
Immense Strength: Kendo has great strength as his fists were powerful enough to break through Eijiro's Red Riot Unbreakable technique and injure Taishiro, both of whom are known for excelling at defense. He uses this in conjunction with brass-knuckle style gloves.
Kendo's Quirk allows him to release an extremely powerful barrage of punches.
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Unlike the other seen members, Kendo does not seem to fully respect Kai. This is shown when he openly declares his dislike for his partnering with Hekiji based on their Quirks, and the reasoning behind it, preferring to fight on his own rather than rely on the "Spear and shield" plan they were given. He also does not refer to Overhaul correctly, calling him "Overhole" instead, although this could imply a more forgetful or ignorant nature rather than disrespect.
Outside of these facts, Kendo appears to care very little for Kai's goals or ambitions, openly revealing them to Taishiro, seemingly unconcerned with the repercussions for committing such an act.
Kendo does not appear to particularly like Hekiji, though works with him out of necessity. Clashing with his calm and calculative nature, Kendo dislikes Hekiji for attempting to restrain him when it comes to battling. He will even go as far as to attack Hekiji when he will prevent him from getting a fight that he desires, or even when he tries to stop Kendo from displaying his own brand of honor.
Kendo meets Eijiro during the Hero's raid on the hideout after Mimic separates him and Fat Gum from the main group. He manages to damage Eijiro's hardened state by blowing him into the wall with his punches. Before Kendo could land his finishing blows on Fat Gum, Eijiro used himself as a shield and withstood the attacks, leaving Kendo impressed by how he was still standing. After he and his partner Hekiji are defeated by the BMI Hero, Kendo reveals that there are some First Aid supplies in another room and tells him to heal Eijiro as he wanted to have another fight to the death with him, showcasing how much respect he has gained for the young hero for his unyielding resolve and dedication.