Because keep in mind Ryoma was THERE that day and saw everything GO DOWN and we already know he has a lot of deep rooted issues about the whole event. And it’s never stated anywhere afaik, but what if Ryoma knew about Kaze’s role in all this?? I figure Ryoma could have found out in a number of ways, like maybe Kaze confessed it to him like he did with Mikoto or Ryoma ended up listening in to Kaze’s talk to Mikoto about it ect.

and if Ryoma DOES know, do you think that he always like resented Kaze and thought less of him because of it? But of course never really despised Kaze for it because Ryoma probably begrudgingly came to realize and accept that the entire event WAS an incredibly poor turn of fate.

But still like literally the only interaction we have between Kaze and Ryoma is in the drama CD where, when Ryoma and Corrin are having a friendly chat post-chapter 4 and when Kaze tries to join in Ryoma just tells him to fuck off