Only the Author Can Save Them Now: Saradiart is so unbelievably powerful that it takes an Original Kartia to kill him once, and he can clone himself. There's simply no way that Toxa and co. are anywhere in his league, so Mona has to use elf magic herself to stop him.
Tear Jerker: This troper does not cry, but surely felt moved in many instances:
Shell dying to revive Lacryma and bidding farewell to Kainas
Misty and Duran professing their love those cute crying sprites sealed the deal even more
Lacryma and Troy calling each other names when she uses the Nothingness Kartia