Renee had sought more "investment" from Heine before she left Makala.
At that time, Heine suggested that instead of relying on others, she should work harder herself, such as learning useful skills and knowledge.
Right after she defiantly asked, "Can you also teach your Spirit Communication Art," Heine decisively passed on all his experiences to the princess.
He did not care whether she really wanted to learn, as long as she could, that was best, if not, so be it.
Looking at it now, Renee had indeed learned it.
Moreover, having completed the purification early in Makala and then receiving the power shared by Beryllo, she had now become a qualified Spirit Communicator.
Therefore, she possessed a transformation technique similar to Heine's.
However, unlike Heine who could manipulate anger and combativeness, she harnessed the desire for purification and protection of Beryllo, a nature spirit.
