Yandere/Professional Wrestling


 * WWE has done this on more than one occasion, including one storyline when Mickie James was introduced as Trish Stratus' biggest fan. Her obsession increased until Trish couldn't take it any more. This resulted in Mickie turning on her beloved.
 * AJ Lee is the most high-profile recent example of this trope in action in WWE since, as the targets of her... "interest" are the WWE Champion (her most recent crush) and his challenger (her ex).