King Triton

King Triton is the aging but powerful ruler of Atlantica. He had long white hair and a beard to match, and is very majestic-looking. He carries the Trident which contains undescribable powers. He is the father of Ariel, who he deeply cares for, despite the fact he shows it through a stone heart. The Trident can be used to activate the world's Keyhole.

Kingdom Hearts
Triton saves Ariel, Sora, Donald and Goofy from some Heartless. He is immediately distrustful of the three newcomers and later confronts them in Ariel's Grotto and advises Sora to leave since he is the Keyblade Master. Ariel retrieves an item that can activate the Keyhole, but Triton destroys it. Ariel falls victim to the plans of Ursula who steals the Trident, leaving Triton injured. After Ursula's defeat, Triton uses the Trident to help seal the Keyhole.In Birth by Sleep he as a little boy heard the Legend of the Keyblade that can bring Destruction that is why he does not trust the Keyblade and their Master's at all.

Kingdom Hearts II
Triton returns as ruler of the sea, but is concerned more than ever for Ariel after she saves a human, Prince Eric, from death and has fallen in love. He asks Sora to help her forget about the human world and practice her singing. Triton discovers a statue of Eric in Ariel's Grotto. Ariel once again falls victim to Ursula's plot and becomes a human for three days. Ursula captures Ariel and takes Triton's Trident. The Trident is used against her and kills her. Triton finally accepts Ariel's love for Eric and allows her to stay with him. He is seen in the end credits bidding farewell to Ariel and Eric with Sebastian and Flounder.