after you entered Grim Gate and searched your way through the Underworld, you came across Cerberus, patrolling the large building in the center of the Underworld. He glanced over at you with his deep green eyes, his wolf heads growling softly

“Greetings, mortal…what brings you to my domain?”

you could see he had a red electric guitar strapped across his back, although that was the least of your concerns