It tends to be an interesting question, because you can give many answers whilst barely limiting who you could be, e.g. sister, daughter, cousin, niece, friend...I reckon the "who are you?" thing is specifically what makes you you (but not "a soul". Whilst that is what makes you you, the detail is necessary lol. Oops, off-subject again...) So, like for Odysseus, he could be "Odysseus of Ithaca, son of Laius, blinder of the Cyclops" and you know precisely who he is - there is no-one else of these details. So perhaps it is not what you say, but the precise combination of what you say that is "who" you are. Does that make any sense whatsoever? (My friends often say I don't, LOL...)