Gyutaro (couldn't reach him into S):I really like his design and his abllities. Truly a "don't judge a book by it's cover" moment Rui: His spider abillities are pretty cool and the fact that he forced a family Douma:His design Is pretty nice. looks like a femboy though Hantengu:from what I seen his forms are cooler than his normal look. Daki:she's hot and her abilities are neat. Koukoushibo:His 6 eyes are really cool and it's a good play on "If you can't beat them, join em" Akaza:His design is sick and his abillities are cool Enmu:looks like a femboy. also his abilities are mid tier because He couldn't destroy their cores himself gyokko:he looks like something you see when you get the good stuff.
sadly I can only do koukoushibo and douma from design as I don't read the manga