Bakugan Battle Brawlers

Alice Gehabich (Masquerade) She is a 14-year-old girl from Moscow who didn't play Bakugan until her identity of Masquerade had disappeared from her body. Upon his departure, Masquerade left her the Darkus-attribute Hydranoid. Michael is her grandfather, but after learning that her grandfather became Hal-G and works with Naga, she constantly worried about him. Alice usually just gives advice to the brawlers, instead of battling. Alice and Marucho are the stratigest of the brawlers. Unlike Marucho, Alice gives her strategies to the brawlers. During season 2 she left the Brawlers after finding out that she was Masquerade but later returns in time to save Dan and Drago. Alice has a special ability to see the G's of an Bakugan on the field. Since Masquerade was 1st rank then second that means Alice was 2nd rank since she was Masquerade. Her Guardian Bakugan is Darkus-attribute Hydranoid which she inherited from Masquerade after he left her body.

Runo Misaki At the age of 12, Runo is not your typical pre-teen girl. Runo is a tomboy through and through who loves playing Bakugan with people that have skills. Like Dan, she has a short temper and gets angry when she loses a battle. Runo has a crush on Dan but she would not admit it (until episode 32) and is jealous of Julie taking Dan's attention. In battle, she uses light attributes. At the end of the series, Runo is seen with Dan on a date. She and Alice have a big sister-little sister relationship. Her Guardian Bakugan is the Haos-attribute Tigrerra

Marucho Marokuro He is a wealthy, 11-year old, blond-haired boy with glasses. He is caring, strong at heart, polite, and generous. He used to be extremely obedient to his parents out of generosity, but that changed when he met the Brawlers. He now has no regrets for the past, realizing that he only wanted to make his parents happy. His Guardian Bakugan are the Aquos-attribute Preyas and the Hoas Angelo/Pyrus Diablo Preyas. Preyus was sent to the Doom Dimension in Marucho's battle with Klaus Van Hertzon. Later Klaus shows up with Preyus. Dan and Runo find a way to get Preyus back through defeating him in battle. Preyas evolves into a two-sided Bakugan called Preyas Angelo and Preyas Diablo. Unlike the other Bakugan however, Preyas multiplies when he evolves, so Marucho got to keep the old Preyas.

Julie Makimoto She lives in Bakugan Valley. She's 12 years old and sort of upbeat from the rest of the Battle Brawlers and tries to stay happy even when the worst has happened (for example, when Billy ended up under the control of Masquerade), her acting happy after something terrible happened is generally just to cover up her real feelings. Julie can also forget things easily, proving that she is a little scatterbrained at times. She is always up and happy with a positive attitude. At the beginning of the series, she is shown to have a crush on Dan (which led to some arguments with a jealous Runo), but later, she likes Billy and accepts a date offer from him. Julie has a sister named Daisy who has bested her in everything since she was a child. Her Guardian Bakugan is Subterra-attribute Gorem.

Dan Kuso is a 12 year old boy whom loves bakugun and spend all his time playing it. He has a crush on Runo. His Guardian Bakugan is Pyrus Dragonoid (nicknamed Drago) who is always telling him the right thing to do. Close to the end of the series, he evolves into Pyrus Delta Dragonoid and defeats Masquerade, freeing him from Alice's body. He is ranked the number one Bakugan player in the world. At the end of the season finale, he is seen going on a date with Runo.

Shun Kazami He is a strong, silent, cool type 13-year-old. He was the 1st ranked Bakugan player until Masquarade came then he moved down to 6th place then to 3rd place. He created the rules and regulations of Bakugan with Dan and is a master of the game, and also is Dan's childhood friend. Shun is a loner, a boy of very few words, yet is willing to help his friends at every turn. He approaches the game like a ninja, being very calculating. He lives with his grandfather (who used to be a famous ninja warrior) who once expected Shun to follow in his footsteps instead of playing Bakugan. His Guardian Bakugan is the Ventus-attribute Skyress whom Shun received from his comatose mother.