Ares

Ares is the god of war, son of Zeus and Hera.

Physical Description
He dresses in a leather jacket and sunglasses, which hide balls of fire where his eyes should be and rides a Harley Davidson motorcycle. He also has a huge knife on a strap on his leg, and has short cropped brown hair.

Relationships
He is Aphrodite's boyfriend, and has been for many centuries. His children share his malevolent attitude, including the demigoddess Clarisse.

The Lightning Thief
During the winter solstice, Luke Castellan stole the master bolt and the helm of darkness. Ares caught him, but Luke (with help from Kronos) planted Kronos's plan in Ares's mind. Ares let Luke go and kept the helm and the bolt until another hero (Percy) came along to complete the delivery. On June 14, 7 days before the summer solstice deadline, Ares went up to Percy Jackson, Grover Underwood and Annabeth Chase as they were trying to get dinner in a diner in Denver, and paid for it with golden drachmas. He then got the companions to retrieve his (booby-trapped) shield from the Tunnel of Love ride in an abandoned Waterland. In return he told them to jump in an animal-smuggler's truck to get to Los Angeles. At this point he also gave Percy a backpack with $20, a pouch of golden drachmas, fresh clothes for the three of them, and a package of Double-Stuf Oreos in it. However, this backpack was actually the modified sheath for the master lightning bolt, enchanted by Ares to have the master bolt appear in it when Percy got close to Hades. After Percy, Grover and Annabeth escaped from the Underworld by using the pearls given to Percy by the Nereid, (and after they were rescued by the Coast Guard) Ares was waiting for them at the beach. Ares tried to kill Percy with a boar, but Percy sliced off one of its tusks with Riptide and engulfed it with a wave. He then challenged Ares to a duel - if Ares won, he would turn Percy into anything he wanted, and get the master bolt; if Percy won, then he got both the bolt and the helm and Ares had to leave. Eventually Percy won the duel when he stabbed Ares in the foot; Ares tried to kill Percy, but Kronos prevented him.

The Sea of Monsters
Ares does not appear much in the Sea of Monsters. He is only seen talking to his daughter Clarisse La Ru On the Submirane USS Birmingham. He tells his daughter Not to fail the quest, and get Percy Jackson and his friends out of the way.

The Titans Curse
Ares' appearance in the 3rd book of the Percy Jackson and the Olympian Series is very short. He is seen first at the Junkyard of the Gods, bringing a white limousine with the Goddess Aphrodite Inside. He tells Percy to go and Speak with the Goddess of Love, and sends away Zoe Nightshade, Grover Underwood, and Bianca di Angelo to a Taco Store while Percy gets to talk with Aphrodite. He is last seen in the winter solstice of the Gods. He is only known to vote "Yes" on the destruction of Percy Jackson, and Yell "Hey!". In addition, the curse he gave to Percy in the first book (that, at a crucial time, his sword would fail him) comes back to haunt, as when Percy fights Atlas, his sword becomes dramatically heavy

The Last Olympian
Ares is only seen to congratulate his daughter Clarisse La Rue On defeating the Drakon, and also muttering "I like this idea, then I get to smash him to the pulp and he'll keep coming back for more", when the gods give Percy Jackson the chance on becoming a god.

Trivia

 * As said in "The Lightning Thief" He considers America the best thing since Sparta, as you can do whatever one wants.
 * He uses sunglasses to cover his eyes, which are actually fireballs. The glasses seem to be able to take the heat, but start to melt if he gets mad.
 * His baseball bat can turn into any weapons he thinks of, from a simple bronze sword to a modern age shotgun.
 * He cursed Percy near the ending of The Lightning Thief, when Percy managed to stab him in the heel with his sword "Riptide". Ares cursed him saying that his weapons would fail him when he needed it most. The curse took effect in "The Titan's Curse", when Percy was fighting Atlas his sword suddenly became too heavy for him to lift. Regardless, Percy and his friends stopped Atlas.

Film
In the upcoming film, The Lightning Thief, Ares will be played by Ray Winstone.