Phobos and Deimos are the twin sons of Ares. They ride their fathers chariot into war spreading panic and fear among mortals in the battlefield. Because their mother is Aphrodite, goddess of love, the twins also represent the fear of loss.
Anubis was originally an Egyptian god of the underworld, but became associated specifically with the embalming process and funeral rites. I really like the robotic design of this character as it moves away from most other conventions.