Meliodas's baby sister Melody

Meliodas, the dragon sin of wrath, captain of the seven deadly sins, and a demon that has lived a long time. He has loved and lost. But what if the only person I can show any weakness to is his baby sister Melody, the wolf sin of revenge. Yes that's right Meliodas has a baby sister, in fact, she is about two thousand years younger than her big brother. Like him, she has blonde hair and green eyes. Melody is kind and caring, she looks up to her brother and wants to be strong like him. Now, one day when Elizabeth showed her life changed, for the better or worse? Let's see!