her original hair color is black. not very, very dark brown. it was black. i think after dying it too much it stayed brown......idk. sometimes her hair seems so natural because we've seen her like this for forever and a day, it's difficult to imagine her with black hair. but i saw a way back when her idol days performance she had black hair, and her teeth weren't fixed, she looked very different compared to the ayu we know today. sadly i dont have that performance.....
someone here surely does.