Ludo

Ludo is the main antagonist from the Disney XD series Star vs. the Forces of Evil. He is voiced by Alan Tudyk.

Background Information
Ludo is a seemingly powerful villain with many henchmen at his disposal, and is seemingly Star Butterfly's worst enemy, as the way they speak to each other seems to indicate they had met prior.

Trivia

 * Ludo is the 4th Disney character voiced by Alan Tudyk. The first 3 being King Candy from Wreck-It Ralph, The Duke of Weselton from Frozen and Alistair Krei from Big Hero 6.
 * He also provides the voice of King Butterfly in the series.