Planet's Spirit

The Keyblade themed after Aerith Gainsborough from Final Fantasy VII.

The white and pink hilt guard is designed as a shoutout to the White Mage job class, technically what was Aerith's combat role in the team.
As for the shaft, it is literally condensed Lifestream, signifying her connection to the Planet as the last remaining Ancient/Cetra...formerly.
Three white lilies become the Keyblade's teeth, a reference to Aerith being a flower girl and the flowers she look after at a rundown church.

I do not own Kingdom Hearts nor Final Fantasy VII.