Mars is one of the main protagonists in SolarBalls and is the 4th planet from the Sun. Mars is generally outgoing and friendly and is shown to encourage and inform other celestial bodies. When he meets Titan, for instance, he lists off his geological features and admires him for his interesting physique, and he also encourages Mercury to stand up for himself when Venus bullies him. Despite his friendly demeanor, he can also be honest when he needs to.