I think this episode should be called ‘How Hikari Pwns Everyone’ - she starts off by triggering the Prince(ss?) of Tennis thing by reawakening Kaname’s sense of honour and causing Ms Snake Eyes to give up the teachings of Megumi Kannazuki. Then she easily deflects Shion’s attempts to manipulate her into persuading Amane to run for Etoile. To top it all of, she manages to heal Yaya’s heart and restore our dark-haired goddess’ will to sing while maintaining the Amane x Hikari line.