There are times when author made Ara-ara character and subvert the expectation by having them be an innocent and pure maiden. Elizabetta is the subvert version of that where the author take Onee-chan tropes and run with it. I really like it. She grew so far from being background token lewd succubus.
That's nice. MC isn't wrong in his modern world thinking, but keep shoving it down the throat of people from different culture, who has been very accomodating of him, result in a rift in relationship. Kudos to author.