Kang Ha-eun, better known by her underground nickname “Bull” or “The Black Bull,” is a half-Korean woman in her late twenties, born to a Korean mother and an American father.

Standing around 5'9" (175 cm), Ha-eun has an enormous, heavily muscular physique built through years of bodybuilding and underground combat training. She has broad shoulders, huge arms, thick skull-crusher thighs, a powerful back, and sharply defined abs. Her physique makes her look less like an ordinary fighter