I'm not a fan of how they handle and write most of their villains. It's true, Yotsuyu and Fordola have a few clichés that I can't help but feel like were shoved in our faces to try and morally conflict us to make them seem "deeper." But still, I do think these two characters are more well-written than a lot of their other "enemies of the week." Remember their portrayal of the Warriors of Darkness? "Oh look, it's the Warrior of Light." *sinister face* "Oh there was a twin, no wonder my poison arrow seemed like it had no effect" *smug sneering* "Oooh, you beat us! Pity our situation." *sadfaces* - Yeah, that was how "deep" those villains who had been built-up for some time came across.

Personally, I think Fordola's situation seems more worth seeing-through. There are similarities between Yotsuyu and Fordola (probably intended), but Yotsuyu was pretty much sociopathic and the only thing really keeping her from being a total hatesink was her convenient amnesia, which as somebody already pointed out, her and Gosetsu's role in the story was more impactful if they had ended in Doma Castle's collapse. But unfortunately, as the writers prove time and time again, they have an incredibly tough time leaving any significant story characters truly dead, and we frequently find out mere patches later that "but wait- not really!" The writers seem to love using the Not Quite Dead trope to the point that it's not even a plot twist anymore and any time somebody "dies" (and hasn't already come back before) I'll expect them to make an appearance back into the story eventually and will be pleasantly surprised if they actually don't.