Legitimate as opposed to a) trolls pretending to be otherkin or b) roleplayers pretending to be otherkin. Trolls pretend to be otherkin “for the lulz” and to mock the community. Generally they’ll make themselves sound as ridiculous as possible, on purpose. Roleplayers, on the other hand, generally pretend to be otherkin for attention and make up wild stories about themselves. They’re the ones who go around claiming to be able to physically shapeshift, or claiming to be physically thousands of years old and immortal, etc.