Mars is the 4th planet from the sun, and the 2nd smallest. He is called the Red Planet due to his surface being reddish-orange in color. He's usually a friendly planet who's happy to spend time with others, such as his friends Venus, Earth, and Jupiter. Despite him witnessing the Earth belittling his moons and letting go of the friendship, he still is determined to protect the Earth, shown when he found out about plans made to destroy the earth by the moons Ganymede and Europa. He's very mature.