Responses
As a reader of the novel I can safely assure you there is no harem and no romance. The Inquisitor will continue to gain character development and Deb will also show up a lot more. The group's relationship with the Demon Knight is one of the best parts of the story, not to mention the Demon Knight himself is one of the best protagonists I've ever seen, trust me when I say you have a lot to look forward to :3c
Another rare find, no romance and no harem so far. Hopefully it stays that way.
Red hair girl will piss you off so bad initially but surprisingly enough, there is actual progression of her character development in chapters 20 and above (it was there in the earlier chapters but it's bigger in later chapters). Understandably, not everyone can enjoy her character, maybe that's why they put the white lion mage by her side for balance.
Personal opinion but the white lion lady (assuming that's the correct race) needs more screentime though, especially with her inner thoughts and character exploration. I want to see more of the green cat guy too.