Miraculous: Tales of Ladybug & Cat Noir (2015)

S2E5 Riposte

After suffering defeat in a duel with Adrien, a frustrated fencing opponent is transformed into a supervillain through akumatization, seeking revenge and a chance for a rematch. With Ladybug as the only one available to defend him, she must step up to protect Adrien from the vengeful foe.