Kinto was a waterbender from the Northern Water Tribe. He was a chronic practical joker who played many tricks on his friends, often to the point of alienation. Unable to tolerate ignorance, Kinto was a big showoff and thus disregarded much of the Water Tribe's teachings in respect and honor. He never settled down for long and had ambitions in exploring the whole world.
Kinto was considered a dark character and was known for using painful or cruel waterbending techniques, such as daggers of ice or manipulating the water in one's stomach. Many of his pictures showed him as being an enemy to AvatarAang and his friends, such as one displaying Aang trapped in a sphere of water, another showing Kinto trying to cause a tidal wave on top of the gang riding Appa and one with Kinto and Sokka battling, and Kinto apparently triumphing. He was also seen to be quite powerful, being able to disable a Fire Nation warship by himself.
Kinto's manipulating water in the stomach sounds greatly similar to bloodbending. However, Kinto was created before the introduction of bloodbending in the series.