In Greek mythology, Deimos (Ancient Greek: Δεῖμος, lit. 'fear' pronounced [dêːmos]) is the personification of fear. He is the son of Ares and Aphrodite, and the brother of Phobos.
“and Terror, and Rout, and Discord that rageth incessantly, sister and comrade of man-slaying Ares; she at the first rears her crest but little, yet thereafter planteth her head in heaven, while her feet tread on earth. She it was that now cast evil strife into their midst”
Il. 4.440–444
“gleaming white, and in the midst of them was one of dark cyanus. And thereon was set as a crown the Gorgon, grim of aspect, glaring terribly, and about her were Terror and Rout. From the shield was hung a baldric of silver, and thereon writhed a serpent of cyanus, that had”
Il. 11.35–39
“and himself did on his gleaming armour. Then would yet greater and more grievous wrath and anger have been stirred between Zeus and the immortals, had not Athene, seized with fear for all the gods, sped forth through the doorway, and left the throne whereon she sat, and taken the helm from the head of Ares and the shield from his shoulders;”