Kinto was known for using painful or cruel waterbending techniques, such as daggers of ice and manipulating the water in one's stomach. He was able to trap people in a sphere of water, as demonstrated when he trapped AvatarAang inside a bubble, and could bend massive tidal waves at moving targets, such as when he attempted to strike down Appa carrying Team Avatar. He possessed considerable strength, as he was able to disable a Fire Nation warship by himself.
Kinto was also skilled in hand-to-hand combat, as he was able to hold his own against Sokka and even get the upper hand.
Kinto was a chronic practical joker who played many tricks on his friends, often to the point of alienation. Unable to tolerate ignorance, he was a big showoff and thus disregarded much of the Water Tribe's teachings of respect and honor. He never settled down for long and had ambitions in exploring the whole world.
Kinto's manipulating water in the stomach bears similarities to bloodbending, which was still an unknown technique at that time.