Mercury is the son of Slippy and Amanda. He has green and white skin and blue eyes.
Mercury is pretty impressionable, as he believed the stories of Raiden and her friends' stories of their adventures across the galaxies. He seems to be very goofy and oblivious as well, often ignoring scary-looking heroes and villains. He also seems to care a lot about family, calling Raiden his big sister. Mercury is shown to love all things space related. He's wanted to become a mechanic like his father and has a great deal of knowledge regarding space and science.
Mercury wears a normal all space suit and his main weapon of choice is a blaster.
Trivia:
Mercury is the fastest of his siblings, a hint at his name.
He bears the most resemblance to his father.