During his lifetime, he had an mutual enmity with the Second Tsuchikage: Mū which ended in both men killing each other in what would be their final confrontation. From this rivalry, he knew Ōnoki when the latter was a child and had constantly picked on him.
He was of tall and slender stature, and his face was accentuated by his relatively long, blond hair, which was worn in a combed-back style. He also had a small, blue, triangular marking on his chin, a thin moustache, no eyebrows, and very prominent lines at the sides of his mouth. Due to the effects of the Summoning: Impure World Reincarnation technique, he had black sclera but retains his blue irides.
His typical attire consisted of a long sleeved, high-collared, grey robe, which has the pin-striped pattern that is common amongst the shinobi of Kirigakure. This article is worn over a hark-blue suit, with a similarly coloured sash wrapped around his waist and a pair of sandals which reached up to his calves.
As the Mizukage, he was undoubtedly an immensely powerful shinobi. He has identified himself as a Yin Release genjutsu user. This was witnessed in his ability to use the mist exuded by his summon, the Giant Clam, to create mirages that appear so real, that his opponents have great difficulty in finding his actual location. The fact that he was also able to kill Mū, another Kage - albeit at the cost of his own life - also stands as a testament to his skills. Even when informing a considerable portion of the Fourth Division on how to defeat him, none of them were able to grasp the concept behind his techniques, allowing him to kill and injure a significant number of them with relative ease, suggesting that the Second Mizukage's combat capabilities are truly fearsome.
The Second Mizukage is typically laid back, jovial and has a somewhat carefree attitude at times. He is also very charismatic and not averse to praising other people, as seen with his unmistakable excitement upon observing the enormity of Gaara's sand attack. In spite of this carefree attitude, the Second Mizukage still cares deeply about the fates of the shinobi originating from his own village, lamenting the prospect of having to confront them after his reincarnation.
He also seems to have somewhat of a short-temper at times, which is especially apparent when concerning Mū and their enmity, which he seemingly places more value upon than even his own life, aptly demonstrated by the manner of his demise and his neglect to ascertain the nature of his reincarnation, simply because his killing of Mū was brought into dispute. Part of this enmity seems to be due to the Mizukage's dislike of how selfish and underhanded Mū is as seen when he lashed out at him for telling Ōnoki that he should be sure to take advantage of the disbanding of the Allied Shinobi Forces. The Second has also taken a great liking to Gaara, referring to him as a "golden egg" amongst the current five Kage and even refused to help him any further in dealing with his Steaming Danger Tyranny clones, in order to have him prove his worth.
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