He has Black Hair and Deep Blue Eyes. He is the first born Son of Zeus and Hera. His younger full brother is Hephistas. He is also the Half- Brother to Artemis. They are best friends, and possibly more brother and sister than Artemis and Apollo are, though there is no romantical inclination between them in any way. They are the same age, meaning they were born at the exact same time. Making both Artemis and Ares Zeus's first borns.
Ares is indifferent to Artemis's actions, nevertheless he will mention his opinion now and again. He usually pops up unexpected, however because of their deep relationship Artemis can sense him before he appears.
Ares is one of the four rioters as it were that terrorized Olympus. The other three included Artemis, Amon, and Diana. All four of them are close friends and have been through a lot together and got in trouble together.
It is not known by many, but Ares and Artemis placed an intrigte network of passageways and trap doors throughout Olympus. It is believed that the only other person who knows of this is Zeus.