Lust was born in Kirigakure with her six other siblings and her father. Her father named each of his children after the 7 deadly sins. She was the only girl amongst the six other children and the only one with weird squares on her left hand so it was hard for her to herself amongst her siblings.
Her father had each of the siblings go to the ninja academy when they were of age, but didn’t like seeing Lust go there. He didn’t want her to get harmed in any way possible because of the squares on her hand. Lust thought it was stupid of him to think that since she could take care of herself. When she reached the age of 10, she graduated from the ninja academy and had formed a team with her brothers Gluttony and Envy. They took their missions seriously and always came back successfully.
However, one day, Lust was cleaning the house while her siblings and her father were out doing things in the village. When she went to go and clean her father’s room, she saw several scrolls on the floor that had Lust’s name on it. Curious, she read the scroll which explained why she had the squares on her hand. It said that Lust has the ability to wield Dark release, a special kekki genkei that Lust had never even heard of before. Later that night, she asked her father what dark release was and he explained it all to her. Interested, she asked her father if she could leave the village to find a trainer to teach her dark release. He let her go and she set off to different parts of the world at the age of 21.
One year later, She stumbled upon a village in need of new villagers. That village was called Amegakure and being a bit tired from all the walking she thought she could rest there for a while. When she got there though, there was alot of other people enjoying the new village and it looked insanely fun to her. She then met a man named Nagato.. who could teach Dark release. She asked him to teach her Dark Release and he took her in as a student. Lust spent nearly 3 weeks learning Dark release from Nagato..and had mastered it completely. She then decided that it was a great idea to stay in the village for a while until she needed to move on from Ame.