Dimensional Breakage
Everyone whom Amelia Watson has ever helped uses the fragmented state of reality to give her a power boost with music
Kronii Ouro has Amelia Watson dead to rights.
Korone Inugami, in her simple way of thinking, starts singing a song, hoping to help Amelia Watson by giving her a power boost. To everyone's surprise, it actually works!
As a result, all the friends Amelia Watson has made along her travels joins together and sing a song to give Amelia Watson the strenth to beat Kronii Ouro once and for all.
Amelia Watson is able to stand up to Kronii Ouro and defeat her once and for all.