Mercury is a planet in the Solar System and a character in The Zula Patrol. He is the first and closest planet from the Sun, second smallest (before Pluto), and the trigger-happy, hyper-active of the planets. He has the highest-pitched voice and almost has the same personality as the character Rev Runner from Loonatics, as they both have similar voices and hyper personalities. He is named after Mercury, the Roman god of the travel.