I read up on the translated character bios and I'm starting to like Komanu more. It's always cool to see more friendly/neutral youkai like Kokoro and Kogasa. Also, her personality as well as her explicitly hanging around places of faith gives her a lot of potential in fan works, in my opinion.
I'm still about the same on Nemuno after reading up on her. Her being a very primitive individual in a race of already isolated youkai makes her design all the more fitting. But I can't say I'm not a bit disappointed by that. I still think she has a lot of potential (for some reason, I feel like Nemuno and Seija could be an interesting duo) but it's no guarantee she'll actually be used much. Which is a shame, I really like her design.
As for Etarnity. Eteranity is still just meh. I do like the tidbit on fairies going berserk during incidents (because I'm always a sucker for more lore). That's about it. Haven't really gotten a chance to properly play the game yet. I got up to Stage 1 before my computer crashed on me (wasn't sure if it was the game, or something else though).
The menu music is certainly interesting. Not sure if I like it yet, though the last main menu theme that stuck with me was Ten Desire's one.
I know what you mean. In a series where every character design is very symbolic, stylized with very deliberate flairs, Nemuno is just plain and ragged (besides those weird diamond holes, which don't really point to anything relating to a mountain hag?). And she's holding a cleaver, which has a pretty threatening connotation compared to some of the weapons other characters use.
Yeah I'm not really sure about the diamonds at all. It feels like ZUN's been adding more of those weird skirt flourishes in recent games (like with Kokoro's skirt holes, Wakasagihime's robes and Sagume's weird jags), and Nemuno just happened to be the one hit with it this game
And yep, the crude looking cleaver is a pretty unique element. I think that, along with the silly ribbon is what sells me on the design.