Yes. The body and the "Alison" that the liars knew turns out is actually Courtney. Alison's sister. Alison killed Courtney because she pretended to be Ali. The real Alison is alive and is "Red Coat" and leader of "The A team".
Yes, Ali is alive. The girl Emily thinks she killed was her twin sister, Courteney. She was always pretending to be Ali and had grown very close with the 4 girls. A is really Alison.
I'm assuming you're talking about the books? If tu are, it's currently unknown if the real Alison is alive o not. When Alison tried to set the house on fire, Emily propped the door open, leaving an easy escape for Alison. In Burned we will find out if she's alive o not. Hope I helped :)
Yes. Alison is still alive. She killed her sister Courtney because Courtney pretended to be Alison. The body the liars knew was actually Courtney's body. Garrett Reynolds acted like he killed Alison but he didn't. Jenna still believes he did because she was blind when he acted like he killed her. Alison told him to keep quite. Alison is the head of "The A Team". Alison is the one who pulled the Liars out of the fuego at the lodge.
Courtney Dilaurentis was the identical twinsister of Alison. It is releaved In Ali's lies That she acually wasn't mentaly unstable like everyone believed but Alison was. She was más populair in school and Alison was jealous, so she framed Courtney for beiing metaly ill.