Katherine Hillard is a fictional character from the popular franchise Power Rangers. She first appeared in the series Mighty Morphin Power Rangers as the second Pink Ranger, taking over the role from Kimberly Ann Hart. Katherine is known for her strong, determined personality and her skills in martial arts. In addition to her role as a Power Ranger, Katherine is also recognized for her background as a gymnast. Throughout her time in the series, she develops close friendships with other Rangers, including Tommy Oliver and Billy Cranston. Katherine's character has appeared in various adaptations and spin-offs of the franchise.