Concerto

Concerto was a minor one-time villain who is a mad pianist and appeared in the post credits scene in the Rick and Morty episode, Pickle Rick. He once captured Rick and Morty and attempted to crush them with the hammers on his piano, which he did to other helpless victims. Rick and Morty were about to lose all hope and were ready to face their doom. However, just when Concerto was about to kill them with the "B Splat", Rick's new friend Jaguar comes to the rescue and slits Concerto's throat killing him and flies away. Morty asked Rick what just happened, and Rick answered "That Morty is why you don't go to therapy."