The stars determine what houses are meant for each other or not. On your 15th birthday, a tattoo appears on your arm, as you get closer and find your soulmate the color of your tattoo glows the color of your house. The tattoos are the animals of the house your soulmate is in. Hazel Lily Weasley and her twin sister Mabel Willow Weasley are on the journey to finding out their soulmates. They are the first girl-born twins in the Weasley family, right after Fred and George. Enjoy.