Because of Gabriel's weakness, he can't create illusions or akumatize any longer. Nathalie, his housemaid, uses the peacock miraculous turning into Mayura. Now she is the one who can create illusions, and also find a cure for Gabriel.
Paris Primary's family is moving in Paris, including his daughter "Chloe", "Audrey", his wife and the servant "Jean". After being rejected by Chloe, Jean gets akumatized into Despair Bear.
Kagami's mother seems to know about Gabriel's secret, and helps him by creating the alliance ring, and gives it to him with the condition of never akumatizing her daughter again. He gets overpowered and turns into Shadow Moth.