If you have a twin and she dies.. Do you stop saying you have one? Or are you always a twin.. Even when the other half of the equation is gone? Jason Blossom recently lost his sister in a traumatic event that shook Riverdale to the core. Cheryl died just shortly after she requested time to wait for her boyfriend, Eitan Dillon. Cheryl was found, shortly after Jason gave her the space she wanted. Jason always blamed himself for Cheryl's death until he found the one girl that could bring him peace. Dyllen Halloway.