Alya Césaire

"Alya Césaire is... Rena Rouge. Yeah. Wel, I think she could help me wipe out these Coalition of the Red Star forces that get into our way. I bet this complicates their matters considerably."

--Su Ji-Hoon, A Miraculous Apocalypse

Alya Césaire is Marinette's best friend, and a student in Miss Bustier's class at Collège Françoise Dupont. She is also the sole admin of the Ladyblog and head of the school blog. In a Miraculous: Tales of Ladybug & Cat Noir episode, "Lady Wifi," after Alya gets suspended from school because of Chloé, she is akumatized by Hawk Moth and becomes Lady Wifi, a supervillain whose powers come from her smartphone and its Wi-Fi signal.