Shun Kazami

Dan (Danma) Kuso is Shun's childhood friend. They met through their mothers, who would get them together to play since they were little. Dan is a boy who truly loves Bakugan battles, though he tends to get frustrated easily. His greatest ambition is to be the strongest Bakugan brawler to ever exist, a goal he achieves at the end of the first season. He tends to act recklessly and impulsively, which gets him into trouble from time to time. Both Shun and Dan are the same age (18 years old).

Runo Masaki; she's very rebellious and enjoys playing Bakugan. She's always arguing with Dan, as they're rivals. Her best friend is Alice. She's very close to her Bakugan, Tigrerra. One of the things she hates most is when people underestimate her and think she's not that strong just because she's a girl. Over time, and given her current age, she matures a bit, but she still has her temperamental attitude.

Marukura (Marucho) is a kind and gentle millionaire boy who specializes in Aquos. He's the brains of the group. He loves playing Bakugan and working on strategies.

Julie Makimoto is a bit conceited and has "princess-like" attitudes, but despite that, she's cheerful, sweet, and outgoing. She cares a lot about Dan; at first, it was believed she was in love with him, but in Gundalian Invaders, it's revealed that she isn't actually in love with him, she just admires him greatly, as do Jake and Baron. She even threw herself at Dan many times, but it was only to annoy Runo. Later, she becomes the girlfriend of Billy Gilbert, her childhood friend, who is from Australia.

Alice Gehabich is from Moscow, Russia. She used to live alone until her grandfather, Michael Gehabich, invited her to live with him. When he mysteriously disappeared (at the hands of Hal-G), she returned to her old home. She has aunts and uncles with whom she lived while hiding from the Bakugan Brawlers, as she felt guilty about the Masquerade incidents. It appears her parents are dead, or so it is believed, since they are never mentioned or appear. Alice is very polite and kind, always thinking of others before herself. She never shares her problems unless directly asked.

Shun is a fairly skilled Ventus Brawler. He used to be the strongest Brawler until Masquerade arrived and dropped to 6th place, but by the end of the series he reaches 3rd. Unlike other Brawlers, he doesn't have that many Bakugan.

And their Bakugan are:

Skyress Ventus, who was once his mother's Bakugan and was later passed on to him, holds great sentimental value. Skyress can speak and has a very maternal and protective personality towards Shun, whom she cares for like a son.

Monarus Ventus

Falconer Ventus

Ravenoid Ventus

Shun lived in the provincial capital and was trained by his grandfather to become a ninja. He was the best fighter until he was defeated by Masquerade, and also because his grandfather wouldn't let him play. His mother, Shiori, was very ill and died when Shun was only 11 years old, but he wasn't able to see her die. He arrived too late to speak to her one last time because he was in the middle of a Bakugan battle that he himself had started to avoid witnessing his mother's death. Even so, the shock caused Shun to decide to quit the game.

Marucho and Runo try to convince him to return, but he defeats them both in battle. He then agrees to return in exchange for a fight against Dan and Masquerade. After winning, Dan and Shun become best friends again, and his grandfather allows him to play Bakugan once more.

Shun argues with Dan and decides to leave the Fighters because Dan said they didn't need him. Alice tries to convince him to come back, but Komba appears and forces Shun to fight. After defeating Komba, Dan appears and apologizes. Shun realizes he needs to be with his friends.

There came a point when all the Brawlers suspected that Shun or Alice might be Masquerade spies. Julie mistook Shun's grandfather for Hal-G and thought he was feeding him information, though Skyress cleared up the misunderstanding. Even so, Dan fought Shun again because he hadn't told him he was coming to the city, but Alice defended him.

After Dan was sent to the Doom Dimension, Shun became the acting leader and was challenged by Masquerade to go to the Dimension with the others to rescue Dan. When tested by Ventus's legendary soldier, Oberus, Shun had to fight a child version of his mother. He nearly fell into the trap and wanted to stay there with her forever, but Skyress made Shun see that his friends needed him. Thus, Skyress evolved into Storm Skyress.

Like everyone else, he was shocked when it was revealed that Alice was Masquerade. All the Brawlers forgave her, except for Shun, who remarked that Masquerade was very clever since she always knew where to find them. This made Alice cry, and she disappeared for a while. After Alice returned to save Dan and Drago, he forgave her. He rescued Alice and Joe from Naga, but he and Skyress were defeated by him. After the final battle, in which they defeated Naga, Shun said goodbye to Skyress (one of the few times he was shown crying or emotional) and returned to his normal life.

A few years later the Bakugan return, but that's another story.

Shun is a cold boy who usually makes the right decisions in combat. However, when it comes to his friends, he is very loyal and protective. Shun received training in how to be a ninja from his grandfather, and because of this, he is very skilled in hand-to-hand combat, very fast, and can leap great distances. He struggles to develop as a person outside of his duty to protect others, his friends, and his allies; for this reason, he is not good with his emotions. And most of the time, he even has trouble identifying his own feelings, so he can sometimes be guided by what others think he is feeling, or by what he believes is right for him to be feeling.

She has black hair and slightly elongated eyes ending in a pointed amber color.

At 13 years old, she has long hair tied with a green ribbon, black fingerless gloves with metal plates, a slightly loose navy blue t-shirt, a lavender jacket elongated in 2 triangles downwards from her waist to a little below her thighs, this jacket has a set of dark green "X"s on the sides at hip level, the laces that form these "X"s end at her back in 2 long laces with small tassels and rectangular plates on the sides of the jacket on the front edges at chest level to her abdomen, slightly loose black pants with green line details between the thighs and above the knees and on the legs between the ankles and knees and black shoes.

At 16, Shun has cut his hair to shoulder length, wears tight black pants, a black sleeveless shirt with detailed edges and collar, tight black pants, a long green jacket with a hood (which was only used once), yellow embroidery and a set of light blue lines intertwined forming several "X"s, fingerless gloves above the elbows black fastened with a ring similar to a belt to adjust them at the end of the gloves and in the wrist area of ​​said gloves, a circle highlighted with a yellow border and a green line around it and black shoes.

At 17, she initially wears a loose-fitting, short-sleeved vest, green on the outside and lavender on the inside, fastened with a few buttons except for one button left undone. It is embroidered with yellow, a set of interlocking X's on the sleeves and hip, and includes a brown belt, black bandages on both wrists, tight black pants with blue stripes, and blue boots with lavender-violet details, a white ring, and two white stripes on each boot. Later, she wears an outfit that is the armor of the knights of Neathia Castle (it is unknown if they retained it). It is simply a white suit with green and yellow details and trim, a dark blue sash, and a gem on her left hand. Like her jacket in "Bakugan: Battle," this armor is elongated into two triangles.

At 18, during the first part of that year, Shun wore a light green t-shirt with white and dark green details on top, a white jacket with the collar turned down revealing the green lining and yellow details, light brown pants, and black shoes. His hair had also grown a little longer.

During the second half of that year, his shoes began to have yellow details, his green shirt became darker, with yellow lines and long sleeves, he wore a black jacket with the collar folded down revealing that it was white inside with small yellow details, reddish-brown gloves and loose light green pants.