Elissa Forbes is the younger sister of Caroline Forbes. When their parents divorced Elissa started to act out, so she was sent to a boarding school. When her boarding school was burned down Elissa came back home getting involved with the supernatural and she died. When the Other-side collapsed Elissa was sent to the prison world along with Damon and Bonnie. I don't own the plot or storyline behind the people in the vampire diaries only Elissa everything else goes to Julie Plec and her crew.