Doctor (Dr.) Locus is the father and creator of Melody, his robot daughter. He debuts in Bradventure and made a cameo in "No Harmony with Melody, and makes his final appearance in Turncoats as the revealed final main antagonist, where he makes an attempt to take control of Dr. Nora Wakeman's inventions. In this episode, he said about his life that "No one ever wanted my inventions; they thought the other inventions was "soo" much better". However, he ended up getting eaten by Dr. Wakeman's garbage disposal (a giant snake-like monster with a set of teeth for a head), leading the doctor to his demise, but he possibly survived.
He is voiced by Grant Albrect.
Locus is the final antagonist of the entire series.