Nymphadora Tonks - Metamorphagus

A Metamorphmagus (pl. Metamorphmagi) is a witch or wizard with the rare magical ability to change their physical appearance. While most of the wizarding population requires Polyjuice Potion, Fluxweed Syrup, or a Human Transfiguration spell, a Metamorphmagus can alter their form through sheer will alone. It is a natural magical mutation that a person with magical blood can be born with and is passed down genetically.