Katherine "Kat" Hillard [Power Rangers]

Katherine "Kat" Hillard (later, Katherine Hillard-Oliver), Kat initially appears as a minor character, passing the series, Kat was ambushed by Rita Repulsa and put under a spell, becoming a temporarily ally of the Evil Space Aliens , she served as the main antagonist of the two-parter "A Ranger Catastrophe", and becoming the monster Katastrophe, served as the central antagonist until she's freed from Rita's spell during the three-parter "A Different Shade of Pink". After being saved by the Power Rangers, Kat decided to become the second Pink Ranger of the 'modern era' of the Mighty Morphin Power Rangers, and the second Pink Ninja Ranger of the Ninja Rangers.