Mylene Farrow, occasionally called Mylene Pharaoh due to transliteration differences, acts as a primary antagonist in the New Vestroia arc. As the Aquos brawler of the Vestal-controlled Vexos and their sole female member, she exhibits pale skin, turquoise-blue neck-length hair, and a sleek futuristic style. Her signature attire includes a royal-inspired white bodysuit with purple and gold accents and a dramatic blue cape lined in white fur. Alternate disguises encompass a formal white pinstriped suit with red bow tie, and casual wear featuring a cropped purple top, beige capri pants, and orange heels. Her personality blends cruelty with pragmatism; she readily discards Bakugan she deems weak—Aquos Fly Beetle, Freezer, and Jelldon—and later abandons her guardian Elico and Volt Luster’s Brontes, declaring weapons with feelings useless. She replaces them with mechanical Bakugan like Macubass, which is destroyed in combat. She covets power, viewing living Bakugan as inferior tools. While coldly efficient, she acknowledges Volt Luster as a friend and mourns his apparent death after the Death Bombs incident. She frequently insults Prince Hydron as a "spoiled brat" and "imbecile" but shields him from Zenoheld’s anger. Her dynamic with Shadow Prove shifts from initial mockery—calling him a "freak show"—to mutual loyalty as she accepts his genuine care. Superficially loyal to King Zenoheld, she privately considers him deranged for his genocidal Alternative Weapon System but obeys out of fear of execution. Imprisoned, she exploits Mira Fermin’s naivety, taking her hostage to coerce Spectra Phantom into revealing Phantom Data. In her final battle against Spectra and Mira within Bakugan Interspace, she triggers a Death Bomb to kill them, collapsing the dimension. Rejecting rescue by Spectra (Keith) and Mira, she chooses death over surrender. Shadow Prove joins her voluntarily; they vanish hand-in-hand, Mylene smiling authentically. Strategically, she oversees Bakugan capture operations and commands during Hydron’s absences. She engineers traps using Shadow’s voice-mimicry to lure Ace Grit and Marucho Marukura. Her combat record includes defeating Ace via Elico’s attribute manipulation—causing his disappearance—and winning against Marucho and Mira Fermin alongside Runo Misaki (with Lync Volan). Losses occur against Dan Kuso and Baron Leltoy (with Shadow), Shun Kazami off-screen, and joint defeats with Shadow in Beta and Gamma City that destroy Dimension Controllers. After fleeing Vestal when Resistance lies surface, she hunts attribute energies for Zenoheld on Earth and the Vexos Motherpalace. Her key Bakugan include discarded Aquos Elico, destroyed Aquos Macubass, and Bakugan Trap Aquos Tripod Theta. She employs ruthlessly efficient tactics, exploiting Aquos’ flexibility for maximum strategic advantage.