As an adolescent my villains face will mirror her face as an adult with some simple changes. Her hairstyle to a high pony tail to give her a more youthful look and initially a happier expression as at this stage she is not yet revengeful.
Below I have placed the sketch of my teen villains face beside the original sketch of her face as an adult just to showcase the difference. Her features remain the same as you can see the main things that I have adjusted is her hair and her expression. The difference will be seen even more once my teen is digitised.