Arion

Arion is the immortal equine son of Demeter and Poseidon.

History
Poseidon once tried to woo Demeter while she was searching for her kidnapped daughter, Persephone. She rejected his advances and transformed herself into a mare to escape him. Transforming into a stallion, the god chased her until she tired, producing Arion as a result.

The Son of Neptune
Arion was first mentioned by Hazel, when she saw him in Alaska in her old life, where she thought she saw him eat a gold nugget, but didn't believe it was real. She followed the horse around all day trying to get close enough to it to ride, but he would always run away, eventually using his incredible speed to run far away for several decades.

Arion was later caught by the Amazons (which took many years), and caged because he couldn't be tamed by any of the members in their ranks. Queen Hylla said that Arion would only be released by the strongest female warrior, but Arion hated all the Amazons. When Hazel arrived, she pulled gold from the ground and gave it to him to eat. Later during Hazel, Percy, and Frank's escape, she set Arion free and he pulled Frank and Percy in a chariot while Hazel rode on his back. He followed Hazel all the way up to Alaska and helped her in her fight against the giant Alcyoneus. He pulls Alcyoneus out of Alaska and into Canada as he can't die in his territory. He then carried the group back to Camp Jupiter in four hours and Hazel rides him into battle against the army of the giant Polybotes and they win the battle.

Personality
Arion exhibits a highly overconfident attitude and has a very colorful vocabulary. At one point when Arion is speaking and Percy is translating, Percy says "Dude, I've gotten suspended for saying less than that." He is also pretty mean and says bad things to Frank and Percy, while he respects Hazel. However, he is shown to be scared or at least nervous around Tyson and Mrs. O' Leary.

Abilities
"...Arion runs like the wind over land and sea."

- Hylla to Hazel


 * He has enhanced strength.
 * He can run 800 miles an hour, traveling faster than sound.
 * He can create sonic booms when traveling at super speed.
 * He can run up vertical slopes.
 * He can run on water.

Prophecy
According to Hylla in the Son of Neptune, there is a prophecy stating that the most courageous female warrior would someday master Arion and ride him to victory, ushering in a new era of prosperity for the Amazons. The exact lines of this prophecy remain unknown. This might have come to pass since Hazel mastered Arion and now the Amazons are working with Camp Jupiter instead of against them.

Trivia

 * Because both of Arion's parents are gods, he is technically a god or has a small degree of godly power allowing Arion to help kill Alcyoneus.