Fistleo is a lion-style Pseudoroid with a bulky scarlet body evoking the look of a muscular fighter. He also has an orange mane that can ignite itself, green lights on his upper body, and clawed hands and feet. A Pseudoroid with a fierce personality, Fistleo is only interested in honing his skills and increasing his strength. He will do anything to gain power, which is the reason he joined Serpent's ranks. He despises weaklings.

I am Fistleo! I have come for your life boy! My Reiouken attack will be enough to defeat this little boy!!