Phobos (Ancient Greek: Φόβος, pronounced [pʰóbos], meaning "fear") is the personification of fear in Greek mythology. He is the offspring of Aphrodite and Ares. He was known for accompanying Ares into battle along with the ancient war goddess Enyo, the goddess of discord Eris (both sisters of Ares), and Phobos' twin brother Deimos (terror).
In Classical Greek mythology, Phobos is more of a personification of the fear brought by war and does not appear as a character in any myths. Timor or Timorus is his Roman equivalent.