Chiyomaru and Tessan are characters from the mecha fighting game Cyberbots: Fullmetal Madness. While their mech is playable in the arcade, Chiyomaru and Tessan are unplayable in the arcade, but are playable on the home versions.
Chiyomaru is the head of the resistance fleet while Tessan is his guardian. The resistance forces' mission is to find and destroy the doomsday weapon created by the Weapon's Brain: G.O.D. The two were once part of Earth Corps until they left to form the resistance. Chiyomaru pilots the P-10033 GAITS.