They should have been properly used throughout the game. First you only tease them, then you slowly introduce them individually, so you get to see their battle abilities (e.g. with a classic "Kenshin" saving the day scene, where some remenant shows up to help you out in a dire situation; little, but cool as hell things like that), and then you can put them in the hands of the player, if only punctually.
The narrative/plot (counter-)argument is silly anyways, since one could easily adapt the plot to what helps for a better gameplay. Once settled, they could have easily been freed from their main duties, at least some times.
As to the final battle, I don't know, I think the brainwashed superhero team from mark 6 had a more important role to play. hahaha. fuck those nerds.
I also feel like I didn't rely on certain chars much at all (Mebius was surprisingly useless), but I'd argue exactly the opposite: there should be more playable chars, but you don't get them all, you have to pick, and chose wisely (and ideally have to face/fight those you didn't pick for your team; heck I could imagine recruiting Kudan at some point, but obviously only at high opportunity costs...).
The problem here is also, and something one could learn from a rance, that all playable chars do is to duke it out. Take rance, where each turn you can assign your chars to do various things, from dungeon crawling, to exploring, to brainwash duties, formerly negotiations, or just to do the sexy times. And of course, the chars have more general attributes, that is something other than battle skills. In short: having plenty of chars, also minor literally who characters, can be great, as long as you also got some more "mundane" stuff to do for them. Again, no, demon roots does not need to be another rance, but there are some good and rather general lessons to be learned from rance (and many other games).
Really? I think that little shit is hilarious. How he switches from
to
and back to
in an instant. Love it, and his whole emperor attitude. Classy, horny little shit. But I'm biased, since I like his buffs (+critical on so many extra +1 lilly normal attacks is op as fuck/not balanced at all, bwahaha). Also his successor/brother plot was solid enough, it's just the Diana part that is odd as hell. Thinking about it, that little dude should have amassed a harem of tiddy sluts throughout the game, while never touching any of the playable chars/girls, who all get super butthurt and jelly. Or something, but I'm sure there would be some more potential in that char, way better than being the plaything of older, smelly ladies and getting pegged all night long. the fuck.
also his little scene (or just the pixel animation from the back, hahaha) in that lovely hot spring/onsen/swimming pool in polkas bohelos mansion is great. Then again, that whole room is just lovely.
Yeah, me neither. 0 fucks given.
Mark 6 was a huge mistake.