Melanicus

Melanicus was a being which resembled the medieval conception of a demon.

Melanicus was a Kalichura, whose race lived in the Althrace system. After trying to conquer Althrace, he fled to another dimension. He came into contact with Catavolcus, a tyrant from Earth in the third century, and persuaded the tyrant to summon him into Earth's dimension via a magic ceremony, and thus joined forces to form an alliance. He eventually took control of the Event Synthesizer, disrupting the flow of history and causing the Millennium Wars. He was eventually stopped by the Fifth Doctor and Sir Justin. (COMIC: The Tides of Time)

Melanicus once attended Bonjaxx's birthday party on Maruthea. (COMIC: Party Animals)

Behind the scenes
The Tides of Time was originally printed in black and white and has been colourised three different times. Just like Beep the Meep, this has lead to inconsistent colours for Melanicus. In Doctor Who (1984), Melanicus was coloured bright green by Andy Yanchus. In Doctor Who Classic Comics, Melanicus was coloured yellow by an uncredited colourist. In Doctor Who Classics, Melanicus was coloured bronze by Charlie Kirchoff.