Toffee is one of Ludo's most recent minions, and later the true main antagonist of Season 1 of Star vs. the Forces of Evil and the series. As far as the other villains on the mainly saccharine series go, Toffee is very serious, and is far more threatening and competent than Ludo or his minions.
He's voiced by Michael C. Hall who also played Dexter Morgan.
Biography
Toffee is an evil efficiency expert who is first hired by Ludo in the episode Fortune Cookies. Discovering that Star took fortune cookies seriously, he had Ludo's minions give Star a fortune cookie that said "Love is always the answer", so that she would refuse to fight back against the monsters, giving them hugs instead. However, when the two-headed monster told Star the truth, she blasted the monsters away, foiling Toffee's plan.
In Mewnipendence Day, Toffee replaced Ludo's right hand man Buff Frog, who did not trust him, with an electronic eye to spy on Star. He also introduced a mace with a portal hidden inside it and sent Buff Frog to use it to get Star's wand to Ludo. However, he sabotaged the device so it would not work for Buff Frog, resulting in him failing his mission. Toffee then convinced Ludo to fire Buff Frog.
After Ludo's attempt to take Star's wand when the house became a labyrinth of Marco's beard was foiled, Toffee told Ludo's minions that Ludo was incompetent as a leader, and told them to choose between the two of them. The monsters chose Toffee as their new leader, and Ludo was kicked out of his castle.
In the season finale, Toffee captured Marco and held him for ransom for Star's wand. Star, Ludo, and Buff Frog joined forces to defeat him, during which Star blasted his left arm off, but he regenerated it and threatened to crush Marco, revealing that he wanted Star to destroy her wand rather than give it to him. Star used the Whispering Spell to destroy her wand, which caused an explosion that blew up Ludo's castle, presumably killing Toffee; however, he is seen smiling as his "death" unfolds, hinting that he expected the wand to explode and that he may possibly be alive, or that his plan has yet to truly come to fruition.