I think Celestias pain is often overlooked.. her sacrafice, the lost love of her sister, is the thing that saved Equestira.
„sacrificing“ her own sister (or well banishing her to the moon) must have been the most pain she ever felt.. i mean lifting the moon every single night for thounsands of years and seeing her sisters face.. also having Glass windows of her depicting how she beats her sister.. must have been torture. I think our princess needed a bit of recognition

as here depicted, the blood from her heart turns into water (and as we all know water is basically the source of life)

i think it turned out quite well