Gaster

W. D. Gaster was the royal scientist before Alphys, responsible for creating the CORE. Gaster is a skeleton that looks a little bit like the puppet, but with 1 black tear coming down from his eye, and 1 coming to his forehead. He has a black lab coat with a grey sweater. He has holes in his hands, and sometimes it does not show his arms, and sometimes it does. Gaster is a dark, and cruel entity scattered across space and time. He is mysterious, and he likes to do science experiments to entertain him. He also likes creating Amalgamates, including one of Asriel Dreemurr's dead body. He's Also horny for sex