Ares
Aries, the constellation and Zodiac sign is unrelated to Ares, the Greek god of war described below.
Ares, in Greek mythology, is the god of war. Also called Mars by the Romans. When Halirrhotius raped Alcippe, Ares ("man", "male", "strife") daughter by Aglaulus, Ares murdered him for which he was tried in a court, the first murder trial in history. He was acquitted. His companions included his sister Eris, his sons Phobos and Deimos and Enyo. Ares was followed by a retinue including Pain, Panic, Famine and Oblivion. Though immortal, he was very sensitive to pain and went running to his father, Zeus, whenever he got wounded. He was worshipped primarily in Thracia.
Otus and Ephialtes were two brothers and giants. The brothers at one point wanted to storm Mt. Olympus. They managed to kidnap Ares and hold him in a jar for thirteen months. He was only released when Artemis offered to sleep with Otus. This made Ephialtes envious and the pair fought. Artemis changed herself into a doe and jumped between them. The Aloadae, not wanting her to get away, threw their spears and killed each other.
Ares gave Hippolyte the girdle that Heracles took.
One night, while having sex with Aphrodite, Ares put a youth named Alectryon by his door to guard them. He fell asleep and Helios, the sun, walked in on the couple. Ares turned Alectryon into a rooster, which never forgets to announce the arrival of the sun in the morning.
Enyalius was sometimes used as an epithet for Ares, though the name probably referred to a separate, Spartan god of war originally.
Consorts/Children