Responses
For me I think that there won’t be a character death.
The tragedy tag is more of a former lover’s death, I’ve read yaois with tragedy tags that had that type of storyline. A character having difficulty moving on from a dead lover, in this case it’s Erie (since Mutou is still showing up in the raws as a memory) and the fact that his revenge is all for him. He mentioned that Mutou’s goal is his reason for living now.
I reread the whole series and with so many lost & confused fellow readers I decided to create this character summary
https://drive.google.com/file/d/1jY9cd05TbJ7Mf4uH9Ou5CQsKnJPTJU39/view?usp=drivesdk
Hope this helps everyone! The last part, this crossover, is not yet finished since I'm still waiting for the translation, I only saw the raws.