Season 1 Aquos

Marucho: The Aquos brawler of the bakugan battle brawlers.

Preyas: Marucho's partner. Evolves into Preyas ll, Preyas Angelo, and Preyas Diablo.

Klaus: Klaus battled with Chan Lee (a pryus brawler), and Julio (a haos brawler). They, at the time, were working for Masquerade (a darkus brawler) against Dan (a pyrus brawler), Runo (a haos brawler), and Marucho.

Sirenoid: Sirenoid is Klaus's partner. Sadly Sirenoid does not evolve, but is a powerful bakugan that almost beat Marucho's Preyas.

Christopher: A brawler who wasn't confident about his brawling skills, and always lost to a bully who was a Darkus user.

Juggernoid: Christopher's partner. Juggernoid is one of those bakugan like sirenoid who do not evolve.

Jenny: An Aquos user.

Siege: A very powerful bakugan. Siege is a water night that washes up the battlefield.