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.
Anti-Villain: Baba Yaga, arguably. She didn't actually do anything to provoke the Baron into trying to drive her out of the valley other than just being there, and doesn't even lay the curse on him until he tries to attack her. She's on speaking terms and generally gets on well enough with Erasumus (though she cheats at cards), and she never once tries to interfere with the Hero's efforts in the valley. Sure, she's an unpleasant, cannibalistic and evil sorceress, but all she really seems to want is to be left alone.
Cheetaurs. Can take alot of damage and inflict alot with a double claw and bite attack.
Fridge Logic - The bear in the caves is shackled in place and won't do serious harm unless you get very close to it. You can attack the bear and kill it, or you can avoid conflict by casting calm or feeding it before you walk past it to the caves, where the bear doesn't even care to notice you and can even be talked to. The latter of which is also what you should do if you want the good ending, because killing the bear or freeing it from its bonds reverts the bear to its previous form, Bernard von Spielburg, the missing son of the baron. So why is it that when you engage in combat with the bear, then cast calm while still in combat, would the bear calmly decide to eat you like every other monster or enemy you do this to? And why did it not occur to the hero to step back a bit once the bear is calmed, rather than stand there like a fresh slab of steak in front of a bear that, again, is trapped in place and transforms into his human form if he wasn't shackled? For that matter, why do enemies, such as the brigands, still calmly devour you if you also cast calm on them while in combat?
The Calm spell is specifically designed to lower emotions and ease aggressive intentions if, and only if, the target isn't already trying to kill you. If they are trying to kill you, and you cast calm, then they will calmly try to kill you, because the spell doesn't change their intentions at all. If they're beating you to do death while angry, or beating you to death while calm, they're still beating you to death.
Goddamn Bats: Regular sauruses, goblins and Mantrays are not overly tough (though Mantrays fly and are harder to hit in combat, and are immune to Dazzle and Calm) and appear frequently. Also, the sauruses and mantrays don't give any loot.