Gexal

This jester moves like a rubber hose character, and he is locked in a secret location in the basement of the main building, and you can hear his humming. When you free him, you'll see him in various locations across the facility, singing songs. His only ability (other than being a 3D rubber hose character) is that he can summon any string or wind instrument. Also, freeing him unlocks the secret ending where you drive off into the distance in your van with him laying on top of it, singing of course.