Written by Zinna
Amy is the show’s first witch. She is seen casting evil spells on the various cheerleaders in an effort to become one (Witch). It is soon revealed that Amy’s mother is inhabiting Amy’s body in an attempt to relive her glory days (Amy’s mother was a championship cheerleader in her heyday). The real Amy is not an evil witch at all, but rather a once-chunky uncoordinated girl with an evil witch of a mother.
Amy returns in a later episode as dabbling wicca that Xander spies trying to pull a magic fast one on one of their teachers. Having just been dumped by his make-out partner (Cordelia) in the most humiliating way possible (in front of everyone at the Bronze on Valentine’s Day), Xander blackmails Amy into casting a love spell that is supposed to make Cordelia love him. Instead the spell makes every female except for Cordelia mad with desire for him. With all the women wanting one man, crazy fights and chaos ensues. Eventually, Giles helps Amy reverse the spell and all returns to order (Bewitched, Bothered, and Bewildered).
Some time after Willow’s discovered her knack for the black arts, the death of two small children causes the parents of Sunnydale to go on a witch hunt. As a result, Amy, Willow, and Buffy are tied to posts and are to be burned alive because of their interest in the black arts. Amy, in attempt to escape and scare her captors, turns herself into a rat (Gingerbread) and scampers away. The spell proves to be too advanced for Amy and she remains a rat even after the danger has past and the parents have come to their senses.
Willow spends a great deal time trying to reverse the spell, but is unsuccessful since it’s really hard for anyone other than the witch that cast the spell to reverse it. So, she keeps Amy as a pet.
Amy reappears for a second in Something Blue as a result of Willow’s spell to lessen her pain (Willow had some difficulty coping with Oz’s sudden disappearance). The spell granted Willow the power to have her will done, but it was quite a while before Willow knew that the spell was working. Willow’s back was turned when she willed Amy to be human again and then back to rat. So Willow never realizes that for a moment she’d turned Amy back.
More time passes, apocalypses come and go, and all the while Amy runs the wheel in her cage. Then one day while Willow is looking for something to ease the grief of her break-up with Tara, she figures out a way to transform Amy back to her human self (Smashed).
At first, Amy proves to be a great distraction for Willow. Despite her years as a rat, Amy still has knack for magic. Willow is thankful to have someone else that is magically inclined to play with especially since everyone else (including Tara) keeps getting down on Willow for her excessive use of magic.
Then Amy takes Willow to her local magic dealer for a fix (Wrecked). Willow quickly becomes dangerously addicted to the high and goes back to the dealer with Dawn in tow. Of course Willow and Dawn suffer a bad accident as a result of Willow’s addiction, so Willow vows to never do magic again. Amy does not take this vow. In fact, the last time we see Amy, she’s giving Willow a magical charge without Willow’s permission. Once Willow copes with the magic relapse, she firmly lets Amy know that Amy is no longer welcome at the Summers’ house (Doublemeat Palace).