So...I was about halfway through the third book in my series, and while I was looking through my bookshelf I realized that one of my characters seems similar to one in another novel I read years ago, around the same time I started to work on my series. The antagonist in my series is basically an attractive, charming sociopath. These are the three traits which are the same...but the background and motivation which I created for the character are completely different. When I first noticed the similarity I thought “Well, it probably doesn’t matter because it’s not anywhere near the same thing anymore, even if it was at one point.” But I guess now that I’ve seen the ways in which they’re the same, I can’t un-see it, and I’m debating removing the character from my series...which is going to be a pretty big hassle since it’s an integral part of my story (and it means cutting the aspects of the character which I know I came up with on my own). I suppose that the traits I described could belong to a lot of different characters in different works. However, I’m pretty sure, when I think about it, that I did take inspiration from another book even if not intentionally. I’m not sure how ethical this is. Anyway, I just thought I’d ask for everyone’s thoughts on this before I make any changes. Any advice would be appreciated!