Triton

Triton is the sea messenger god, and son of Poseidon, god of the sea, and Amphitrite, goddess of the sea. Triton is also the herald of his parents, but seems to be a bit scornful toward his half-brother, Percy, which is not for selfish reasons, as he acts respectfully to children of Poseidon who actively fight for his domain against Oceanus, his grandfather, such as Tyson.

Biography
Like his father, Triton carries a trident. However, Triton's special attribute was a twisted conch shell, on which he blew like a trumpet to calm or raise the waves. Its sound was so terrible, that when loudly blown, it put the giants to flight, who imagined it to be the roar of a mighty wild beast. Triton dwelt with his parents in a golden palace in the depths of the sea

Triton was the father of Pallas and foster parent to the goddess Athena. Pallas was killed by Athena during a fight between the two goddesses. Triton is also sometimes cited as the father of Scylla by Lamia. Triton might be multiplied into a host of Tritones, daimones of the sea.

Triton was adopted by the Romans as the son of Neptune and Salacia. In the Aeneid, Misenus, the trumpeter of Aeneas, challenged Triton to a contest of trumpeting. The god flung him into the sea for his arrogance.

Triton is also known to have a bad relationship with Dionysus. At a festival for Dionysus, Triton was found watching nymphs take a bath before the party. The nymphs told Dionysus and it didn't end well for Triton. This may suggest that Triton is crazed and a drunk due to his bad relationship with the God of Madness.

The Last Olympian
Triton is somewhat cold and arrogant to Percy, talking down to him and acting as if his half-brother was lazy for not appearing sooner (this is after Percy jumped off the now blown up Princess Andromeda), though is respectful to Tyson. Triton makes fun of Percy, smiling at one of his comments. He is seen only briefly however, so his actual attitude in general is unknown. He also seems to be proud of being Poseidon's son (saying "Your son and heir!"). He shows respect to Tyson, by bowing.

Appearance
Triton appears as a merman, having the upper body of a human and the tail of a fish, and shares his father's black hair. Unlike most mermen, Triton has two fish tails instead of one. He is described as having green skin, black hair, and two tails like a merman.

Powers and Abilities

 * Triton presumably has the standard powers of a god.
 * He also somewhat shares his father's powers to control the sea even having his trademark trident
 * He also is able to evoke fear in others using his conch shell, though it's unknown if this is magical or rather just fear.
 * Triton may have control over boats like his father, Poseidon.
 * Presumably all the powers of Percy Jackson but more advanced due to being Poseidon's heir as Lord of the Sea.