Spectra Phantom, born Keith Fermin, evolves from a formidable antagonist in *Bakugan Battle Brawlers: New Vestroia* to a strategic ally in *Bakugan: Mechtanium Surge*. The son of Clay Fermin and older brother of Mira Fermin, he initially mentors Mira in Bakugan battles, sharing a strong sibling bond. Disillusioned by his father’s brutal experiments on Bakugan—including Hydranoid’s torment—he embraces a quest for power, joining the Vexos as their leader and mastering the Pyrus attribute. Adopting the Spectra Phantom identity, he dons a red mask and feathered coat, wielding his Guardian Bakugan Pyrus Helios MK2 and Trap Bakugan Metalfencer. Ruthless tactics define his reign: deploying Forbidden Ability Cards, manipulating allies like Gus Grav, and taking hostages such as Runo Misaki to further his ambition of creating the Ultimate Bakugan. His nine clashes with Dan Kuso fuel *New Vestroia*’s conflicts, yet glimmers of humanity emerge—releasing captives Shun Kazami, Ace Grit, and Marucho Marukura to secure Mira’s loyalty, and aiding New Vestroia’s evacuation during crises. Defeated decisively by Dan, Spectra abandons his alias, reclaiming his identity as Keith Fermin. Redeemed, he joins the Bakugan Resistance, reconciles with Mira, and adopts the Darkus attribute in *Mechtanium Surge*. His Guardian Bakugan evolves into Darkus Infinity Helios, complemented by a black mask and purple-accented attire. Though retaining tactical ferocity, he redirects his prowess against threats like Mag Mel and the Chaos Army, deploying innovations such as BakuMutant Mutant Helios, Mechtogan Slynix, and Battle Suit Doomtronic. Loyalty defines key bonds: Gus Grav’s unwavering allegiance persists even after Vexos betrayal, while his rivalry with Dan matures into uneasy camaraderie. Post-redemption, Keith’s cunning endures—orchestrating schemes to aid the Resistance and sacrificing himself temporarily to secure allies’ escape from Interspace. His arc weaves themes of power, redemption, and familial ties, balancing ruthless ingenuity with a hardened resolve to protect others, cementing his legacy as a tactician reborn.