A human(?) Champion from Noxus in League of Legends usually played as an AP mid. Known mostly for her deceiving and tricky magical prowess, and being extremely powerful initially but growing significantly weaker as a game goes on. She is the leader of an underground guild of Noxian magicians called the Black Rose. It is heavily implied that LeBlanc is not the person but instead the title for said position.
Her real first name is Evaine.
She is allies with Jericho Swain.
Full title: Emilia LeBlanc (Evaine) the Deceiver
source: danbooru wiki