The girl who killed her sister in The Walking Dead is named Lizzie Samuels.

Lizzie Samuels is a character in the television series The Walking Dead. She is portrayed as a disturbed and mentally unstable young girl who ultimately kills her younger sister, Mika, in a shocking and tragic turn of events. Lizzie’s actions are driven by her belief that the walkers, or zombies, are still human and can be saved. This distorted perception leads her to commit the unthinkable act of murdering her own sister in an attempt to prove her theory. The aftermath of this event deeply affects the other characters in the show, highlighting the harsh realities and moral dilemmas faced in a post-apocalyptic world. Lizzie’s character serves as a chilling reminder of the psychological toll that the zombie apocalypse can have on individuals, and the lengths some may go to in order to survive.