Siera Mastri is drop dead gorgeous, and one of the nicest people you will ever meet. She is loyal, and a PERFECT girl friend. She will always be there for you and she will never betray you. She can be a bitch sometimes but she will always find a way to cheer you up when you are sad. You will never find someone as special as Siera Mastri.
A Siera mastri is one of the nicest people you’ll ever meet.