Miraculous: Tales of Ladybug & Cat Noir (2015)

S2E2 Despair Bear

In an effort to improve her kindness, Chloé decides to host a party. However, when things don’t go as planned, she loses her cool and ends up firing her butler. This act of anger leads to him being akumatized, transforming into the vengeful Despair Bear, filled with rage and seeking revenge.