Gus Grav serves as Spectra Phantom's steadfast second-in-command throughout the "New Vestroia" season. Initially fixated on raw power, he evolves to recognize the value of friendship. His journey involves defeating Dan Kuso early on, suffering subsequent losses, and ultimately betraying the Vexos. This betrayal leads to his presumed demise battling King Zenoheld, followed by imprisonment, escape, and a final alliance with the Battle Brawlers. His documented narrative arc concludes within the "New Vestroia" season.