Tyreese Williams, nicknamed Ty by many of his companions, is a main character and survivor of the outbreak in AMC's The Walking Dead. He is the older brother of Sasha and was also the leader of a small group of survivors. He became one of the first newcomers at the prison.During his time at the prison, he formed a relationship with fellow Woodbury survivor,Karen. After Karen's death and the downfall of the prison, he became the primary caretaker of Judith Grimes and also Lizzie and Mika Samuels temporarily. A strong yet compassionate individual, Tyreese struggles with his own morality while still managing to protect his group, often trying to prevent any bloodshed. His favored weapon is a hammer.