I know this is just a tribalism thread, but I wanna say this piece: a statement like "this is a definitive ranking of those singers" is often meaningless.
The reason for that is that the skills vocalists have are multiple and situational. Some singers are better at certain things than other, but multiple can be really great at many things. Some examples.
Irys is amazing at accuracy, her notes are effortlessly always correct.
Gura has a very unique, pleasant and interesting timbre.
Nerissa is great at nailing lines in the high falsetto register.
Enna has great enunciation and a nice timbre as well.
Mori is great at belting and enunciation.
I'd say Suisei is an amazing all-rounder and might "average" higher than all these others, but that doesn't mean they can't have better performances than Suisei could on certain songs that suit them well.
Hell, Fauna can probably give a better performance of LMSH than any of those girls kek.
