u/EngineerHot6700 — reddlx

Yeah, she was one of my top 3 favorite characters in this story (Sumi, Mini, and Ruka). But Ruka is getting increasingly toxic. I know she isn't the main character, but her actions are starting to completely contradict her own storyline. Normally, she was a kind-hearted person. Considering her condition, it's perfectly normal for her to fight to the very end for the person she loves. But making her this annoying is just a terrible choice.
You might remember the conversation with Nagomi. It was said, 'Seeing Chizuru happy with someone else is enough for me.' I think this is exactly what Ruka's ending will be like: finding happiness in knowing that he is happy with someone else. But instead, she has started acting completely ridiculous (Chapter 403). I'm starting to think this is intentional.