Ethan Nakamura

Ethan Nakamura is a son of Nemesis, the Goddess of Revenge.

History
Ethan grew up like every other demigod. When he was old enough he was brought to Camp Half-Blood by a satyr, where he met Annabeth a couple of times. As his mother was Nemesis, and not one of the Olympians, he was stuck in the Hermes cabin, as his mother was not important enough to have a cabin.

One day he met his mother Nemesis, and she promised that he would one day balance the world power, in exchange for his left eye. She made him blind in that eye, and he wore an eyepatch over it. In the series when he later recounted this story to Percy Jackson, Percy's response was "great mom."

The Battle of the Labyrinth
Ethan was the demigod captured by Kronos' army in the Labyrinth. It is unknown what he was doing in the Labyrinth.

He fought Percy in The Battle of the Labyrinth, as it was the only way to join Kronos' army. Ethan lost to Percy, and he seemed to accept his fate, and told Percy to get along with it, but Percy refused to kill him, and helped him up. When Percy killed Antaeus, Ethan escaped the Arena along with Percy, Annabeth, and Rachel.

After escaping and telling the others his story, Ethan ran off on his own, declining their help.

Ethan is later seen with two telekines, discussing their plan to resurrect Kronos. Percy, who was wearing Annabeth's magical Yankee cap to be invisible, took it off and begged Ethan not to resurrect Kronos. Percy had spared him, but Ethan betrayed him and used himself to raise Kronos.

The Demigod Files
Ethan, with the assistance of Iapetus stole the unfinished Sword of Hades with the intention of using it to resurrect many of the Titans from Tartarus. After Iapetus fell into the River Lethe and the sword was retrieved, Ethan fled.

The Last Olympian
In The Last Olympian, Ethan is a lieutenant of Kronos', and a good soldier. He enters battle, lead by Kronos, and almost kills Percy with a poisoned knife, but Annabeth gets in the way, and it stabs her instead. Percy is furious and hits Ethan on the helmet with his sword, denting his helmet and knocking Ethan unconscious.

It is unknown how Ethan knew where Percy's vunerable spot was. Even Ethan himself didn't know and claimed it was a blur. It's possible one of the gods, probably Nemesis, was acting through Ethan.

On their last showdown, Percy pleads with Ethan that Kronos is evil, and that he isn't about balance, which Ethan has shown he is trying to achieve, by destruction.

Ethan rebels against Kronos at the last second, saving Percy's life. Ethan strikes Kronos' neck, but the blade shattered, one piece ricocheting into his stomach. Ethan tells Percy, with his dying breath, that the minor gods deserve thrones. Kronos then causes him to die by making a fissure in Olympus. Ethan falls into empty air, hundreds of feet above ground.

Percy made Ethan a shroud after the battle, choosing to remember him for his good deeds rather than the evil. His shroud is black silk with swords crossed under a set of scales. To respect Ethan's dying wish, Percy uses his gift from the gods to have them swear on the River Styx that they will honor all the children of all of the gods, and the minor gods themselves by putting cabins in Camp Half-Blood.

Physical Description
Percy stated that Ethan had glossy black hair and a slim, wiry build. The greek armour hung off of him slightly. He is a good fighter and respects his mother very much. His most recognizable feature is the eye patch over his left eye. It is not clear whether his mother, Nemesis, completely removed his eye or simply just took away it's sight.