There really isn't too much to say. I'm fairly certain that this manga ended after one volume due to cancellation. Eris does not really accomplish a whole lot. The last chapter hints at more content, but clearly it was never released. Eris trains with the Sword God for years, and she does not reunite with Rudeus for a long time in the light novel. Hence, there are a lot of stories that could have been expanded on or even added in order to bring depth to some of the other minor characters. If this series kept going, then it probably would have been an 8or a 9. However, as it is, I wouldn't score it too high. It's worth a quick read if you're bored or you like Eris though.