Mira, a 16-year-old Vestal girl, formed the Bakugan Brawler Resistance, after witnessing the tortured Alpha Hydranoid speak out in vengeance to the invaders, to free all the captured Bakugan from Prince Hydron and the Vexos. At the end of episode 10, she along with Baron travel with Dan back to his world. In Episode 12, Mira has to battle Spectra and if she's victorious, Spectra will be unmasked. If she loses, however, she has to join the Vexos, and even battle her own friends. She told herself in the beginning of episode 12 that her hero was always her brother, Keith, but forced herself to change her mind about it after Spectra unmasks himself in front of her, revealing that he was her 'hero'. Baron described her as 'intense'. She betrays the Resistance in episode 19 as she says that she wants to stay with Keith' once telling the others on Earth Spectra is her brother. She returns to New Vestroia through the portal Apollonir opened with Spectra, Gus and Lync after revealing her betrayal. In episode 20, she reveals that she joined the Vexos, but is really wondering what Spectra is up to. In episode 21 she challenged her brother to a battle and if she wins, she goes back to being with her real brother and not Spectra; however, if she loses, she will have no choice but to serve Spectra. She later lost the brawl. She is regretful of this as she says, "I'm sorry my friends" at the end of the episode, and is also seen crying as she has no choice but to be an enemy to the Resistance. She later returns to the Resistance. In a few episodes of the series, Spectra refers to her as Mira Firman; this has been a source of confusion to viewers, as the Resistance referred to her as Mira Clay. She returns to Vestal with Ace and Baron and their Bakugan, in case the Vexos will want to take back New Vestroia for themselves in the future. Mira visits the brawlers on Earth for a visit, but soon returns to Vestal, this time with Dan and Marucho, and they meet up with Ace and Baron at Klaus Von Hertzen's estate. Following the defeat of Zenoheld she returns to Vestal with her brother, Gus, and the rest of the Vestal Resistance. Her last name Clay is possibly a reference to the fact she uses Subterra attributed Bakugan. She also has a brother that she desperately wants to find after he disappeared during Hydranoid's rebellion. Although she is the leader, she is not necessarily accepted by the others, as she has a small tendency to go off on her own. She prefers the Subterra attribute. Her main Bakugan is Subterra Thunder Wilda and her Trap Bakugan is Baliton. She has a crush on Dan and is presented several times: in episode 27 where she tried to see if Dan would notice her change in hair style and in the earlier episode 26 she was extremely sad to the point of crying when she thought Dan was caught in the explosion and upon knowing he survived she jumped into Dan's arms hugging him. In episode 10, Dan brought up Runo and Ace said Mira sounded jealous. It was also the main reason for Ace's hostility to Dan because Ace has a crush on Mira.
Thunder Wilda: Wilda is the guardian for Mira, the leader of the Resistance and has a deafening battle cry to scare away opponents. A massive creature made of rock and hardened clay, Wilda moves slowly during battle, but his incredible durability makes up for this. He also pounds the ground forcefully to rattle his opponents before finishing them with a karate chop.
Magma Wilda: Wilda's evolution when he inherited Clayf's elemental energy. He has a metal armor on his chest and can use a metal stick in battle. He lost the Subterra energy when he & Tigrerra lost a battle against Macubass & Aluze.
Baliton: Mira's Ankylosaurus-like Bakugan Trap in the shape of a sphere with spikes around it. Baliton merges with Wilda during battles. Like Wilda, he is slow to move, but he uses massive weight to crush his foe. His brown exterior is the perfect camouflage when battling in the desert. Horns cover his body from head to tail, and his multi-horned tail with sharp nails at the end can swing around like a baseball bat.
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