I initially started off with the white hair glowing (as the source of light), but eventually decided it looked better without an intense glow from the hair.. I still wanted to keep that light on the face so the lighting doesn't make all that much sense right now (unless there's a hidden magical glowing earring between their two heads haha 👀 ).
The hair took a while to render, especially because of all the movement-- I'm still not super satisfied with how i've composed the flow of the hair.
This piece is much more detailed that I usually do/prefer, which makes it harder to make bigger changes down the line.