Responses
I think Naer is Gu yue for several reasons:
1- She has the same orbs.
2- She loves Wulin just too much
3- It's the same eye color actually.
4- She actually knew wulin immediately and didn't go like "who is this????" When they first met.
Anyone else notice or think that the little sister Naer and Gu Yue the element mage girl are same person they look alike and are attached to Tang Wulin and Naer has little colored orbs come to her here
http://iweb7.mangapicgallery.com/r/newpiclink/douluo_dalu_3_the_legend_of_the_dragon_king/14/e4cce74c9ff904b1419f171e35fdc9da.jpeg
and Gu Yue has them to but can not remember which page it is shown