Keith Fermin, known as Spectra Phantom, is a Vestal and central figure in the Bakugan narrative. Son of Clay Fermin and older brother of Mira Fermin, he initially trained Mira in New Vestroia using his Pyrus Hyper Dragonoid, teaching patience and perseverance. Witnessing his father torture Hydranoid ignited his obsession with power and Bakugan mechanics, driving him to join the Vexos organization. There, he adopted the Spectra Phantom alias, becoming its leader and Pyrus brawler. As Spectra Phantom, he defined himself through cruelty, strategic manipulation, and ruthless ambition. His striking appearance featured spiked blond hair, a red mask with a single functional eyehole equipped with voice modulation and computational technology (earning him the Japanese epithet "Glacial Blaze"), and a red feathered coat, contrasting his original pink-haired Vestal identity. He deployed forbidden ability cards without hesitation, sanctioned Bakugan cybernetic experiments, and undertook morally dubious acts like kidnapping Runo Misaki to manipulate Dan Kuso. His partnership with Pyrus Helios MK2, evolving into Darkus Infinity Helios, embodied his philosophy: together they sought to create the "Ultimate Bakugan" by siphoning Drago's Perfect Core energy. Spectra's tactical brilliance drove his leadership of the Vexos and later actions as a rogue agent. After betraying the Vexos mid-season—framed for collapsing Vestal's Dimension Controllers—he operated independently with aide Gus Grav. Their methods included forcing Bakugan evolution via the forbidden "Chaos Ability X," risking Bakugan sentience. His fierce rivalry with Dan Kuso culminated in nine battles and "Spectra's Last Stand." His defeat sparked profound redemption. Acknowledging Dan's influence, he abandoned the Spectra Phantom persona, rejoined the Bakugan Resistance as Keith Fermin, and reconciled with Mira. Post-redemption, Keith retained Spectra's strategic acumen, applying it altruistically. He occasionally donned his mask during critical battles, like aiding Helix Dragonoid's Battle Gear integration or confronting King Zenoheld's Alternative weapon system, solidifying his role as a brother figure to Dan and protector of New Vestroia. In Mechtanium Surge, transitioning to a Darkus brawler with black-and-purple attire and Darkus Infinity Helios, he assisted the Battle Brawlers against Mag Mel's Chaos Army. He notably attempted a sacrificial act in Interspace to ensure their escape, citing the conflict as "fun" due to his enduring passion for combat. Beyond the anime, Spectra appeared as the primary antagonist and final boss in the video game *Bakugan: Defenders of the Core*, maintaining his New Vestroia-era design and role while Zenoheld served as the overarching villain. His character arc spans relentless ambition, ideological corruption, and eventual atonement, consistently driven by complex relationships with family, rivals, and the pursuit of Bakugan evolution.