It's pretty wild how tamers bothered to include Luna with her original light blue short hair she had in the very first FiM episode and started his best episode, TDOTS, with it. Then Shattered Harmony happened and ever since then, she ceased to be a character and remains as such to this day.
Really makes you wonder if tamers had any plan for in the first place; we still don't know why she randomly appears as NMM or just doesnt have any role at all, outside of that one time she exposition dumped in Outbreak.