Sylvie Laufeydottir

Sylvie Laufeydottir, born as Loki Laufeydottir, is the deuteragonist of the Disney+ series Loki. 
She is, as her name suggests, an alternate female variant of Loki Laufeyson. She has been killing groups of TVA minutemen and obtaining their reset charges with the intent of using them to form a multitude of branches from the Sacred Timeline for an unknown reason. She is Ravonna Renslayer's archenemy.
She is portrayed by Sophia Di Martino in her first villainous role, as Cailey Fleming played the character young.