Earlier, when Shinonome Hangetsu died, some commenters were saying that it felt too early. Maybe that's intentional. In this chapter, I felt a little sad learning that he had passed on his skills to Yuuhi, even though I just felt surprised when Shinonome originally died. Yuuhi's stoic reaction then and emotional reaction in this chapter parallels my own reaction.
Maybe other readers feel the same. I think these kinds of gloomy MCs are often the protagonist because it's easy for the reader to self-insert.