Phobos is a character in SolarBalls who is one of the Martian moons along with Deimos. Phobos is the bigger moon among the two Martian moons. Like his brother and fellow moon, Deimos, Phobos is rather crazy, hyperactive and is always seen with the former. He is also shown to be easily scared, shown when they came back to Titan after trying to search for members in the asteroid belt and quite ignorant about facts, shown when they got surprised about how Jupiter has more than 2 moons.