Mira Fermin, occasionally referenced as Mira Clay, hails from the planet Vestal as the daughter of Vexos scientist Clay Fermin and sister to Spectra Phantom (Keith Fermin). Witnessing the tortured Alpha Hydranoid speak revealed Bakugan sentience and spurred her to co-found the Bakugan Battle Brawlers Resistance alongside Baron Leltoy and Ace Grit, opposing Prince Hydron and the Vexos occupation of New Vestroia. Leading the Resistance, she primarily commanded Subterra Bakugan, notably guardian Magma Wilda and trap Baliton. Her decisive leadership sometimes manifested as unilateral actions, particularly driven by her relentless search for her missing brother. Mira sports short orange hair, blue eyes, and distinctive attire: a silver jacket, blue earrings, and a red jumpsuit with asymmetrical leggings and boots in New Vestroia. Later, her design shifts to a white track jacket with blue stripes over a blue dress and a black collar. Her personality blends stubbornness and tomboyish traits with adaptability, demonstrated by feigning fangirl behavior to deceive Vexos guards or employing flirtation as diversion. Familial loyalty defines her emotional core, culminating in a temporary betrayal of the Resistance to join Spectra upon discovering his identity as Keith. This led to a forced brawl against her friends after losing to Spectra. She ultimately rejoined the Resistance, fighting in pivotal battles against King Zenoheld and the Alternative weapon system, reconciling with Keith after their father's sacrifice. In Bakugan: Mechtanium Surge, Mira reappears supporting the Battle Brawlers, now partnered with Subterra Roxtor. She assists by analyzing data on antagonists like the Nonets and Mechtogan, developing new Battle Suits (including Defendrix and Combustoid), and monitoring Dragonoid Destroyer's energy reserves. Her technical expertise identifies EM pulse capabilities and Mechtogan mechanics. Collaborating with allies Runo Misaki and Julie Makimoto, she accompanies them to Volcano Island to support Dan Kuso. An alternate timeline exists where Mira perishes alongside Runo and Julie during Mechtavius Destroyer's annihilation of Bakugan City, later reversed via time travel. Her final appearances involve ongoing analysis of Dragonoid Destroyer's energy usage and logistical support against Wiseman and Coredegon. Her background consistently highlights engineering aptitude, likely inherited from her father, and unwavering dedication to protecting Bakugan and allies across the New Vestroia and Mechtanium Surge conflicts.