Emerald Sparrow mentioned in her lessons to Lin Xiaolu and Xia Liang that a Magical Girl's magic outfit could grow through hard work and dedication.
This was not an unfounded assertion, as she herself was a testament to that. When she first became a Magical Girl, her magic constructs were not like this.
Back then, she didn't have the seemingly endless amount of silk threads she has now, nor did she have the tailor's scissors she held in her hands. All she had was a sphere made of Magic Silk, which, if one were to liken it to something, resembled a ball of yarn.
