The best champs globally to counter 光辉女郎 include 逆羽, 祖安花火, and 惩戒之箭. These champs are all great at countering 光辉女郎 with win rates over 54%. Even if these 光辉女郎 counter picks are not taken opposite your position, it's not smart to take her into these matchups. They will very likely beat 光辉女郎.
Yet, if the opposing team brings either 星籁歌姬 or 祖安狂人, you should seriously consider picking her, as she easily beats these champs with win rates over 52% against each ofthem.