Duke Creme de Brûlée is the young duke of the Sweetsland Kingdom, who wanted the whole kingdom for himself. He has a secret agenda and wants Mana's affections while overthrowing the kingdom. Chocolat is one of his agents, sent to spy over Ruby's friends. He is also responsible for sending Gumimin's to Ruby's friends, with the problem with his memories being erased.

(Source: Wikipedia)