CloisteredFlame
dreamcatcher
I asked the question after watching a song on Emiko's channel that was by Sawano (which I didn't realize the first l time I saw it).My first reaction would be none of them tbh.
I enjoy Sawano's music for its own strengths and very modern feel, and since he's one of the top anisong hit makers, I was wondering about our girls chances with very different music.
Yes, yes, and yes.I love Keiko only for the fact that it has created appreciation for deep and low registers for many people where normally for women many treat singing as who hits the higher notes, but her voice outside those rangers doesn't stand out a lot. Hikaru is very expressive on her singing so I think that is a huge bonus for her vs the others but I don't know if the Sawano style is for her. And Wakana outside her voice issues and changes, would need very specific kinds of song that I don't see Sawano doing.
I also don't think they would really work. Maybe Hikaru if her voice was in good shape (I've heard Laco and Mizuki sing some pitches off during lives, so it's not about live pitch issues.).
We have heard Wakana sing "Flag" and cover Ghibli songs and so we know she can deliver that kind of period piece, classic ballad, nostalgic vocal. Hikaru covered "Gira Gira" by ADO, and (seriously!) it could have been her own song with the way she ate it up. Sawano will not write a waltzing piece or a strings-heavy ballad (Wakana's range), but he can write brooding music which prime Hikaru vocal quality with recent Hikaru drive and grit could definitely deliver. He needs unique vocalists for even his slow-paced, dreamy songs (E.g. Gemie - who has a lovely bright voice - on "Call of Silence").
Keiko is actually the one who's less vocally distinct, from the three, to me. in all seriousness. Yes she has the warm, low voice and range but it isn't gravelly or piercing enough to stand out (with character), and she doesn't seem to know how to let loose vocally without going to a yell, so she mostly sticks to the dark mysterious stuff (which only works in Kajiura land or in classic Japanese music).
Hot take from me, I guess, but I think part of the issue in the back of my mind with "Yūyami no Uta" was Keiko's vocal quality / delivery, of course compounded by the generally weaker composition and overly repetitive motifs used by Kajiura and the random vocalization (honestly, traditional Kajiurago with Yuriko, etc., might have been better).