Briares

Briares is the last Hekatonkheire (hundred-handed one), his two brothers being faded, he meets Percy and his friends in the Labyrinth during Annabeth's quest in The Battle of the Labyrinth.

Appearance
As his title suggests, Briares has one hundred arms that protrude from his chest and look like a "forkful of spaghetti", according to Percy in The Battle Of The Labyrinth. His arms look like human arms, but his huge feet are unlike humans' with eight toes on each foot. He also changes faces along with his emotions, except for his eyes, which have no whites.

The Battle of the Labyrinth
In The Battle of the Labyrinth, Briares had been captured by the Titan army and imprisoned on Alcatraz Island, San Francisco, being tortured and threatened by Kampe to join them, but despite this he had refused to give in. Spurred on by Tyson and realizing that they had encontered a potentially powerful ally for the war the group plan a rescue. Even so, Briares was immensely terrified of Kampe and refused to leave until Percy won him in a game of rock, paper, scissors. They save him from Kampê but Briares subsequently leaves; having lost his confidence and also in a state of depression because his brothers had faded. This breaks Tyson's heart as Tyson had held high respect and regard for the Hundred Handed-Ones.

He reappears during the battle at the end of the book with the help of Daedalus and buries Kampê by throwing several rocks at her.

Afterwards, he goes to Poseidon's forges to make weapons for the war and to teach the Cyclopses ways they had forgotten in weapon forging in order to give the heroes a much needed edge in the war. He fights for Poseidon in the war against Oceanus, and is very brave.

The Last Olympian
In The Last Olympian, he is seen by Percy just outside Poseidon's palace fighting in the war against Oceanus, battling a giant squid.

Greek Mythology
Briares is the older brother of the Titans and Cyclopes, a son of Gaia and Uranus. Before Zeus and his siblings rebelled, the Hekatonkheires were jailed by Kampê. Zeus then freed them and in return fought on the side of the gods.