Nathalie Sancoeur (aka Mayura) is a character from Miraculous: Tales of Ladybug and Cat Noir. In "Catalyst", which is part of the "Heroes' Day" special, Nathalie is akumatized by Hawk Moth into Catalyst, a power-enhancing supervillain. In "Mayura", in order to save Hawk Moth from the French Miraculous superhero team, Nathalie uses the Peacock Miraculous. When the Peacock Miraculous is inhabited by Duusu, she becomes Mayura, the secondary antagonist of Miraculous: Tales of Ladybug & Cat Noir.