Yup they are I tend to have lots of twins thoughout my works...
I hope to give the an interesting side character role.
Speaking of characters have you ever found yourself liking better a side character or a villain than the main character?
Have you ever based your original characters off of people or your interactions with people? My little sister (who's way better at writing than I am, heck my ability is the lowest out of us three...) told me it's a good way to create and develop characters.
Speaking of characters how is your fic coming along?