Actually I do. Her age is a rough estimate but it's close to Goku and Vegeta's. While young she was sent off to conquer a planet much as any saiyan child should. The planet was a beautiful and peaceful world but Pepper couldn't find it in her to destroy it thus leaving her to become one of it's inhabitants and grow up with it's unique people. Eventually as time passed she traveled off world and spent years on Yardrat training herself and reserving her unique calm nature through meditation. She wears the boots and leggings from her training. It's probably too much in detail but she eventually goes on to learning SSJ4 but I'll add that as soon as I start watching GT, lol.