Working Through The Damage (A Meliodas X OC)

This is the tale of a girl named Lauren Evans. She is the adopted daughter of the King and Queen of Liones. Her adopted sisters, Elizabeth and Margret, were always mean to her. They would pull mean pranks and call her names which lead to Lauren's insecurity. They were nice to everyone else but her. Elizabeth was extremely jealous of Lauren because she wanted all attention on herself. Margaret wanted to be nice to Lauren but she wanted to stay on the side of the sister she was closest to. The only sister that was nice to her was Veronica because they were both tomboys. They became friends and even got to share a room with each other in the castle. Veronica was the only person who had ever been nice to Lauren besides the King and Queen who so graciously adopted her after her parents had abused her and left her out on the streets to die. The person who found Lauren on the side of the road was a man by the name of Meliodas. Meliodas had become Lauren's best friend with Veronica a very close second. Meliodas would train Lauren and Gilthunder, Margaret's crush, to become Holy Knights. Meliodas was perfect in Lauren's eyes. He was always so nice and one time when he saw Margaret and Elizabeth push her into the mud while Elizabeth laughed, he ran over and scolded the two before making sure Lauren was okay. Lauren had all the love and friendship that she could ever need until Meliodas was sent off to battle and he never came back. Veronica stayed by Lauren's side from then on and became Lauren's best friend. Everything was fine until the Holy Knights took over and Elizabeth and Lauren were forced to travel together to find the rest of the Seven Deadly Sins because Lauren already was one; the Tiger's sin of Timidity. The only thing is, Elizabeth doesn't know...