Metamorphmagus

In the fictional universe of J. K. Rowling's ''Harry Potter'' series, a metamorphmagus (meta-MORF-ma-gus) is a wizard born with the ability to change their shape at will. Only one such character has been introduced, so details about the power are limited. It is known that the ability is extremely rare and comes only to those who are born with it, unlike that of an animagus, whose skill is gained after years of hard work. Nymphadora Tonks, a secondary character, is the sole metamorphmagus currently known in the series. She can make small changes, such as altering the length and colour of her hair, with only a moment's concentration. With greater effort, she is capable of more drastic changes, such as making herself appear decades older. There is no evidence that metamorphmagi can take on non-human form (though there is speculation that a metamorphmagi could presumably make themself look like another humanoid species such as a Veela), and it has yet to be seen if they can copy the... full article at wikipedia