|Manga||Volume #4, Boruto Chapter #15|
Boro (ボロ, Boro) is an Inner from the organisation Kara.
Much like other members of Kara, Boro carries himself with a very confident, if not smug, attitude. Upon facing the various abilities of Team 7 and Kawaki, he faced them down in a very condescending natures, viewing their efforts as pointless. Also a committed man, he remained vigilant in his mission to safeguard the sealed Seventh Hokage. Very knowledgeable, Boro is shown able to quickly determine and handle most threats with little shock. As with Jigen, he was devoted to Kara's goal, and was uninterested in other matters such as Mitsuki's attempts to attack him, but became ever more grateful for Boruto's status as Momoshiki Ōtsutsuki's vessel, desiring to capture him for Kara's benefit.
Boro is a tall, heavily-built man with a beard and moustache. He has a trio of tattoos on his face that appear to form the Roman numeral Ⅲ.
Befitting his large stature, Boro is very strong, able to easily life up the massive sealing kettle that contained Naruto with a single hand and likewise able hurl it a great distance. At the same time, he is deceptively fast, able to escape his enemies sight from a moment of them looking away. His body is very resilient, able to take a direct Rasengan will still standing.
He apparently has access to Space–Time Ninjutsu, having been alone inside a separate dimension. He is proficient in Fire, Earth, and Water Release. With the first two, he can perform Lava Release, which he uses to produce a potent and large-stretching burst of acid. With Water Release, he can produce surging walls to block incoming attacks. He can produce a dark mist that will cause all who are exposed to it to gradually lose their strength. He also has a healing technique that will instantly undo all physical damage to his being and even purge him of poison.
Main article: Ao Arc Boro attended a meeting held by Jigen to discuss the urgent situation relating to the missing "vessel". As Jigen dispelled the genjutsu, he voiced that they must recover the vessel at all costs.
Main article: Kawaki Arc Figuring Delta would be disheartened following her failed attempt at retrieving Kawaki, Boro laughed at her when she became frustrated. Shortly after, when he was informed Koji Kashin was observing Kawaki in Konohagakure, Boro questioned what the Inner was doing. Some time later, after Jigen has sealed Naruto Uzumaki in a tea pot in a foreign dimension, Boro watched over it. Shorty after, a group of children came into his vicinity, leading to Boro joyfully recognising Kawaki.
As the children prepared to fight the Inner member, Boro quickly displayed his might, changing the landscape with his Lava Release. As Kawaki absorbed the technique with his Kāma, Boro went for a sneak attack, which was absorbed by Boruto's Kāma. It amazed Boro to see that Delta was speaking the truth about another Kāma wielder. As Boro continued to endure Kawaki and Boruto's attacks and quickly heal, he tricked them into being exposed to his Dark Cloud, sapping away their strength. Boro expressed his delight in meeting Boruto, noting that Boruto's Kāma meant that Kara's time limit for completing their plans can now extended through Boruto as the vessel of Momoshiki Ōtsutsuki. While planning to take Boruto back to Kara along with Kawaki, the combined effort of Mitsuki and Sarada Uchiha gave the team an opening to retreat. Boro however remained calm, knowing they would return since their goal for coming here was the Hokage.