Banabé is not a person in the conventional sense of the word. Banabé is a sensibility that happens to require a body to wear the clothes. The character is real in the way that important things are real: not because they can be photographed, but because they can be felt.
The question of whether Banabé is one person or many, a historical figure or a contemporary one, a man or a woman or something significantly more interesting, is left deliberately open. The mythology grows more accurate the less precisely it is defined.