He is the Royal scientist, and he built The CORE, something he's very excited about. He also stole Alphys' work on DETERMINATION, and gave himself the credit for the discovery. He also lives in The CORE, with Chara. His origins are unknown, and he seems to have just... appeared one day, out of nowhere. He is an enigma, and is slated to appear in DELTARUNE Chapter 6. Chara did push him into The CORE after a long battle, filled with bugs and glitches...