Sisterhood

OC story taking place after Trouble in Tokyo. What if Raven had a little sister Arella never told her about? Before being defeated by his eldest daughter Raven, Trigon sent a piece of himself to Dove. Now, she has nightmares of him and powers. She is enslaved by the villain Sir Mysterio. When her and Raven finally meet, will Raven embrace her or push her away?