Personal crystal

Personal Crystals were lightsaber crystals that attach a bond to whoever finds one first. The only known personal crystal in the galaxy was found in the Crystal Cave on Dantooine and was owned by the Exile. They absorb the excess force from whoever has a bond with it, so they are aligned with whatever side of the force the being is on. Something has to be done to the crystal for it to stay aligned with the user, something Kreia was able to do.