[Shun had thought framing it that way might make it easier to express the problem given Ren's own history, and there's a knowing nod when Ren mentions his understanding. It's good to have someone to talk to who can actually relate to that rather than judging him for it, even if he's unwilling to express the sentiment that openly right now.

As Ren starts picking out lilies, Shun takes up the large pink arrangement and begins weaving ribbon between the stems to keep them together more firmly than just wrapping a few layers around. It's not something he's done before today, but his fingers still move in careful, deft motions that speak of experience with perhaps rope or string or whatever else had to be used to keep things together on the battlefield. There's a somewhat thoughtful look on his face at Ren's proposition, but he doesn't look entirely convinced.]

I'm already trying to find out. But until I do that, even if I try, there's no guarantee I can protect who I want to protect. [There's a bitterness, or almost a tiredness to his voice there, because not being able to protect everyone he wanted to is nothing new by now.] That's the problem. I want to be able to do something about this, but until whatever enemy this is leaves a trace, until we have some kind of sign of their existence beyond what they choose to give us, it feels like there isn't anything. I still feel idle even when others say I'm overworking myself.

[He's making it sound a lot like it's purely his responsibility to resolve this problem.]