Amity as a younger witch was once very sweet, but her parents forced her to cut ties with her best friend, Willow and become friends with meaner and wealthier children, and to make sure Willow would be allowed at Hexside School, Amity complied.  With this, Amity grew to be colder, selfish, and meaner.  It's thanks to a human she met named Luz Noceda whom she had a rough start with that she began to see the error of her behavior and formed a friendship with the human teen and even fell in love with her and thanks to Luz, Amity broke off the toxic friends she was forced to make and rekindled her friendship with Willow.  Amity and Luz eventually became girlfriends and Amity was much kinder than she had been before and would even put her life on the line for Luz just as Luz would do the same for Amity.