Preyas is Marucho's Guardinan Bakugan. He is a humanoid chameleon, and he is able to change his molecular structure so that he can take on the characteristics of all six attributes. Marucho prefers the Aqua attribute.
Although Preyas has a menacing appearance, he is somewhat shy and comical.
Preyas is quite small in comparison with the other monsters, but he makes up for it in speed.