These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Juushin Enbu
Complete Monster: Shimi is a nasty piece of work, obsessed about making Taito miserable so he can unleash his Super-Powered Evil Side and destroy everything. It's justified in the anime because he's a demon. note the physical manifestation of a sword.
Not that Keiro isn't immune to this in the anime, he destroys villages for power, has his son Ryuko imprisoned and then be used as a puppet for questioning him, but his most evil acts are killing his right-hand man and turning the capital's citizens into zombies.