Okay, I have no idea who the others are. I just know what the source claims they are from, and an approximate guess at what they are. The second is definitely Barbariccia, the last is definitely Snow, the others I don't know.
Wow, this is a tough one. Just a bunch of minor bosses from FF gmaes. From the artist description you can copy the names and see the original characters in screenshots with Google Images: 暗闇の雲, バルバリシア, カロフィステリ, メリュジーヌ and Snow. I played 5 but I have no idea what their names were, even so the translated names probably weren't anything like the originals. Maybe we should just leave them unnamed.