Kikyomi, was the daughter of the great snake sanin, as well as lady tsunade. Although she was her daughter, she was never considered as such. Why, you ask? She looked identical to her father and did not have a single (physical)  trait of her mother, other then her brutal strength. She had long bangs, that she pushed off to cover one eye, floor length silky black hair, snake like eyes, and the most famous two traits...her 6 foot long tongue and long fangs. Although Tsunade doesn't consider this a trait from her, she has the same markings near her eyes as her father, but they were not purple, but the same color as the diamond in the center of Tsunade's forehead.