In opinion, Misaki and Yuka are fit to voice portrayal Merli the best. I was leaning more toward Yuka, however, because she doesn't waver as much as Misaki.
Haine has a good singing voice that really doesn't need to be a voicebank of any sort. It's not distinctive but she does have good vocalizing.
A FANDOM User
Where do you listen to the finalists? I can't find it... :C