He is portrayed as being easy-going and mellow; when compared to the Fourth Raikage's over-the-top exit through a window, (destroying the surrounding wall along with it), he tells C that he'll just use the door. Whilst having a laid-back demeanor, Darui isn't lazy, leaping to the Raikage's defense when the bodyguards of the other Kage overreact to the Raikage's actions. He also has a habit of referring to things or events as being "dull" a play on his name.
Darui is fairly tall in stature and has a dark skin color, a lazy look in his eyes and white, shaggy hair which covers the left side of his face.
He wears a high collared sleevless uniform, loose fitting pants, and one-strap-over-one-shoulder flak jacket of a Kumogakure Jōnin. Darui also has stylized characters for Water(水) and Lightning (雷) tattoed on his right and left shoulders respectively, denoting his chakra's elemental nature affinities. The tattoo on his left arm also signifies that he has inherited the third raikages technique.As a sword-user, Darui wields a broad cleaver which he carries on his back. He doesn't seem to carry it around with him in his village however.
Being a high ranking jonin and being a bodyguard of the Raikage, he is very powerful. He is very good with kenjutsu, wielding a large cleaver-like sword, it's peculiar from others swords as it folds in two to be sheathed and unfolds when in use. He is also very proficient in nature transformation and has a kekkai genkai known as storm release, which combines both lightning and water chakra to create many beams of energy that can be guided like missiles. He is also able to use a form of lightning release called black lightning that was passed onto him by the 3rd Raikage. He is also good at chakra flow which allows him to stream electricity into his cleaver or other weapons, increasing their cutting ability.
Five Kage Summit
Darui and C were chosen to escort the Fourth Raikage to the Five Kage Summit in the Land of Iron. When the Raikage jumped through a window, he
tells C that he'd rather use the door. During the Kage meeting, he quickly jumped to protect the Raikage after he smashed the table, because the bodyguards of the other Kage entered into defensive position. After the other bodyguards returned to their respective place, Darui and C did the same.
When White zetsu appears during the Five Kage Summit, Darui, along with C, guards the Raikage and follow him to the meeting with Sasuke. Suigetsu charged at C only to be stopped by Darui and they started battling. Darui and Suigetsu continue their sword fight while the Raikage deals with Jugo and Sasuke. Darui then incapacitates Suigetsu by stabbing a blade into his chest and instilling it with Lighting Release. He then goes to assist C who had been knocked unconscious by Sasuke's genjutsu. He watched as the Raikage seemingly sacrificed his arm and prepares to deal a final blow to Sasuke.
Sasuke counters, and both are saved from further injury by the fith mizukage. As the Raikage is being healed by C, Darui decides to help Gaara, Temari and Kankurō in defeating Sasuke.As they all attack together, Sasuke once again counters with a new form of Susanoo. After Sasuke uses Susanoo to collapse the ceiling onto his enemies, Darui is protected by a sand shield conjured by Gaara. Afterward, he follows the Raikage to chase down Sasuke.
Shinobi World War Arc
After the shinobi army is split up into several divisions, Darui was made the commander of the First Division of the Allied Shinobi Forces. After Gaara's speech, the entire Shinobi army was deployed. Darui and his division eventually split up from the main force on the Kazekage's orders. They head to the west coast of the Land of Lightning, to defend against an assault from the sea.
The white zetsu army, along with kakuzu, Hizashi, Dan, and Asuma in its ranks, eventually arrived the shores. Darui lead the opening attack while the Zetsu were still in the water, launching his black lightning into their ranks, immobilizing and killing several of the Zetsu. While the battle raged, he confronts Kinkaku and Ginkaku. They recognize him as the one who inherited the third raikage's lightning techniques. Darui apologizes to them as they had been shamed by being revived but tells them that he will have to shame them more, boasting that their gold and silver plating might start to flake off when they are hit by Darui's storm release, even though the whole situation is tiresome.
Darui is joined in battle by Samui, and her brother Atsui. After Atsui takes out several white Zetsu, they attack the Gold and Silver Brothers. During the battle Samui, and Atsui have their souls cursed and taken hostage. Kinkaku tricks Atsui into saying the word uses most, and is sealed away by Ginkaku. Ginkaku then takes Samui hostage, in order to force Darui to surrender. As Kinkaku attacks, Darui severs his left arm and uses his storm release technique to attack Kinkaku and Ginkaku and free Samui simultaneously. Kinkaku kicks his arm with the Kokinjo wrapped around it into Darui side, drawing out his soul while Ginkaku absorbs Samui into the gourd which shocked Darui, as she hadn't even uttered a word. After regenerating his arm, Kinkaku curses Darui's soul. Darui then thinks about the word that would cause him to be sealed away if said.