Aphrodite and Ares, and twin brother of Deimos (terror). Phobos was described as the personification of fear. In Greek mythology, Phobos is more of a personification of the fear brought by war and does not appear as a character in any myth. He was known for accompanying Ares into battle along with Enyo, Eris, and Deimos (terror).
Phobos often is depicted as having a lion's or lion like head. Warriors and heroes who worshiped Phobos such as Hercules and Agamemnon carried shields with depiction of Phobos on them. Those who worshiped Phobos often made bloody sacrifices in his name.