the MC "s*xually harassing/raping the maids". I wouldn't call it s*xual harassment and absolutely wouldn't call it rape. From the very beginning, the MC was only interested in the fluffiness of the fur and wanted to pet them. Yeah, it sounds like a sorry-ass excuse but I mean the MC gave the same treatment to the wolf too, so you gonna say that the MC raped the pet? Besides, the whole story (idle talk aside) is written from the MC's POV and I his/her thoughts on the matter don't really come off s*xual in any way. In fact, the protagonist is at his core quite... pure? innocent? though he/she is without a doubt really eccentric
and her love interest is a fairy, small enough to fit on her shoulder. They do love each other though, so it is romance. Still, if you're turned off by this kind of thing, I think you read your way into a wrong neighbourhood.
the MC being gifted in magic, having magic eyes, having a fairy flying about all day long and all...
MC's family and everybody else adores her, but sometimes the adoration borders on obsession, like how her father almost instantly falls in love (not in a romantic way) and decides never to marry her off, or how the MC thanks some random servant (I think it was a steward), whose name she doesn't remember and her begins crying in gratitude, or how during her ability test the girl that was testing summoning attribute at first chastises her parents for dressing her up so gaudily, but instantly makes a 180 turn in her opinion the moment she lays her eyes on the MC. Accidental Celes from Sevens
The girl takes no bullsh*t. You pissed her off - prepare to die and suffer. Sometimes voluntarily. She has her demonic side, but she can not only bring down her Satanic wrath, she can sweetly poison your soul, leading you down the path to hell, like the Devil she is. But she can also be a sweet a kind girl to those she loves and a 'Saint' to everybody else.
Or the multiverse-building, considering she travels worlds and explores their lores and powers in the process
It goes same old cycle, with not many changes to neither herself, nor her demon-servants, nor the way she charms people or eats souls or... pretty much anything else. Kind of like DC&Marvel comics: Bad guys do bad things, the good guys arrive, they fight it out, maybe some even badder guy laughs behind the scenes, the good guy wins, repeat.