Ghost rocker from the "Mastaar" episode (07 Oct 2021) of the 2021 Disney Channel animated television series GhostForce, which despite the name, fights ghosts.
Mastaar lay dormant in a ukulele until awakened by main character Drake Miller playing it. Drake, Mike, and Liv form The Boo Fighters to enter a talent show, but Mastaar tries to take over the city, and they have a battle of the bands to defeat him.
Mastaar emits a sonic wave hypnotizing listeners into loving its music. The more fans it gets, the more powerful it becomes.