Humans

All
Pyrus
Aquos
Ventus
Subterra
Haos
Darkus
Dan Kuso   

Dan Kuso is the main protagonist of the anime series, Bakugan Battle Brawlers. He is partnered with a Pyrus Dragonoid named Drago (who eventually evolved into Fusion Dragonoid). He is also seen as a legend among the Brawlers from Earth as well as toward the Vestals, Neathians, and Gundalians.

Marucho Marukura   

Marucho Marukura is a wealthy, generous boy who specializes in Aquos. He is the Brain of the Brawlers, a real walking encyclopedia. He loves to play Bakugan and to work on strategies. He used to be extremely obedient to his parents out of fear, but that changed when he joined the Brawlers; however he is still very obedient.

Shun Kazami   

Shun is one of the calmest Brawlers in the series. He rarely gets flustered or annoyed and even when he is annoyed; he maintains a cool voice (even though he voices his displeasure). Shun is a lone wolf and always focuses in battles. However, his stamina does have its limits; shown by how he tires after a large amount of constant battling.

Julie Makimoto   

Julie Makimoto is one of the protagonists of the anime series Bakugan Battle Brawlers. Julie is a Subterra Brawler, partnered with Subterra Hammer Gorem. Julie's sister is Daisy Makimoto. By the events of Bakugan: Mechtanium Surge, she has become a news reporter for Bakugan City.

Runo Misaki   

Runo Misaki is one of the protagonists in the anime series Bakugan Battle Brawlers.

Alice Gehabich   

Alice Gehabich is one of the main characters in the anime Bakugan Battle Brawlers. Formerly their strategist, Alice is revealed to be the villain Masquerade (a fact that even she was not aware of, as Masquerade was a separate personality within her). She later acquires his Guardian Bakugan, Darkus Alpha Hydranoid.

Michael Gehabich 

Michael Gehabich or Dr. Michael, is the grandfather of Alice Gehabich. He has a negative split personality in the form of Hal-G, as whom he is seen as for the majority of his appearances in the anime. He first developed Hal-G when a large amount of negative energy from the Silent Core infiltrated his lab. After Naga was defeated by Drago, Hal-G left his body and Michael returned to his normal self.

Gunz Lazar   

Gunz Lazar is a character that appears in the second arc of Bakugan: Mechtanium Surge. His partner is Reptak and his Mechtogan is Chromopod, but when he became the second Wiseman, his Guardian Bakugan became Betadron.

Jenny   

Jenny is a member of the singing/dancing band JJ Dolls, along with Jewls. She loves to brawl and is an Aquos brawler. Her Guardian Bakugan is an Aquos Siege.

Jewls   

Jewls is a member of the singing/dancing band JJ Dolls, along with Jenny. She loves to brawl and is a Subterra brawler. Her Guardian Bakugan is a Subterra Centipoid.