Darui is a fairly tall, dark-skinned man with a slightly bulbous nose, a lazy look in his eyes and white, shaggy hair which covers his left eye. He wears a high-collared, sleeveless uniform with loose fitting pants, bandages on his wrists and the one-strap-over-one-shoulder Flak Jacket of a Kumogakure shinobi. Darui also has stylised characters for water and lightning tattooed on his right and left shoulders respectively, denoting his chakra's nature affinities, Water Release and Lightning Release, as well as the fact that he has a kekkei genkai, the Storm Release. The tattoo on his left arm also signifies that he has inherited the Third Raikage's black lightning. He carries a broad, foldable, cleaver-like sword, strapped to his back, when outside the village.
Darui is an easy-going and mellow individual as seen when the Fourth Raikage's over-the-top exit through a window, he simply tells C that he will just use the door. His personality is also evident through his lazy and languid way of speaking, often times referring to things or events as being "dull" - a pun on his name. While having a laid-back demeanour however, Darui isn't lazy, leaping to the Raikage's defence when the bodyguards of the other Kage reacted to the Raikage destroying the desk he was sitting at. Darui is a very apologetic individual, and will even apologise for other people's actions - a trait he had never noticed himself; this attribute leads him to saying "sorry" just as much as the word "dull". He also possesses a strong loyalty to the Fourth Raikage whom he often addresses as "boss", rather than adding the suffix "sama" to his title as others do. The Fourth in turn, considers Darui his "second right hand", and because of this, Darui will just as quickly verbally defend the Fourth as he would physically.
Darui is a highly skilled and capable shinobi. He learned how to create black lightning under the tutelage of the Third Raikage, making his lightning-based techniques even more powerful. His chakra reserves are great enough to not die of chakra exhaustion after using three of the Treasured Tools of the Sage of the Six Paths and still had enough chakra left to continue fighting. His abilities have earned him the praise and recognition of the Fourth Raikage himself, who appointed Darui as his personal bodyguard and considers him his right-hand man. He is also quite smart, as noted by Kinkaku. This was witnessed in his uncovering the mechanisms of the Treasured Tools during his battle with the Gold and Silver Brothers.
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