Dodai

is a Kumogakure shinobi.

Background
During the Third Raikage's tenure, Dodai instructed a select group of children, informing them that only one amongst their number would earn the name "B" and become A's tag-team partner in order to protect the future Raikage. He then instructed them on how to perform the Double Lariat on a training dummy, while indicating that the result would reveal their capacity to fulfil the duty of "B". As the prospective candidates failed one after the other, he lamented that the day seemed as though it would end in failure, until he observes A and a young Killer B decapitate the dummy.

Appearance
In his youth, Dodai had short and spiky, dark-coloured hair that was largely obscured underneath a stylised forehead protector in the form of a hat. Along with this item, his typical attire consisted of the standard outfit of most Kumogakure shinobi including the distinctive single-strap flak jacket, as well as an eye patch worn over his left eye.

In his old age, the contours of his face have become more pronounced and he has grown a small goatee. He wears the high-collared variant of the Kumogakure outfit along with flak jacket and his signature forehead protector. His eyepatch now has the stylised kanji for inscribed upon it.

Abilities
Dodai possesses the Lava Release kekkei genkai, allowing him to combine fire and earth natured chakra. He can use it to create a resistant, rubber-like substance.

Shinobi World War Arc
During the Fourth Shinobi World War, Dodai was assigned to the Fourth Division where he fought against several resurrected shinobi, one of which included the Third Raikage whom he had once served under. While confronting the Third, he revealed the strengths and weaknesses of his deceased superior to the other members of the division, before asserting that to adequately counter the Raikage's endurance they would require a far stronger wind release technique than previously used. When later asked by Temari, he recounted the story of how the Third had died.

When the Third evaded Naruto's Rasenshuriken, he reminded Naruto that the Raikage won't be hit while using his Lightning Release Armour. After Naruto lands a hit and the Third recovers from it fast, he told others about how resistant the Third's body was. When the Raikage began charging his strongest technique, he urged others to get out of the way, and instructed the Earth Release users to prepare a defensive wall, which Dodai himself reinforced with his Lava Release: Rubber Wall. He pulled Naruto out of the way, and commented how foolish some shinobi were thinking they could attack the Raikage when he broke through the wall, as well as explaining the Third's technique. Naruto asks how the Third got his scar if he was so resilient, so he tells Naruto how the Third went up against the Eight-Tails by himself.

Trivia

 * "Dodai" can mean either or  in Japanese.
 * The kanji for inscribed upon his eye-patch, is the same stylised kanji that the users of Black Lightning tattoo on their shoulders to signify their possession of this ability.