Mago

Is Aji Tae's companion and bodyguard. At first appearance, she is a muscular warrior woman. In reality, however, Mago is an intelligent, man-eating panther. The only person who sees her as a human woman, for certain, is Aji Tae; Munsu and most others see her as the panther. It remains unclear whether or not Sando sees her as the human or the panther. To her, Mago is merely an "enemy". (Source: Wikipedia)