Demonic Lord of glass
He often hides in a form of a window and attacks unsuspecting bystanders.
His appearance is similar to that of Geminiman from Megaman 3, except with pieces of razor-sharp glass protruding from his frame.
His name was originally made up from the mispronunciation of Karasuman from Castlevania: Symphony of the Night.
Look at that window, it’s actually Garasuman!