Listening to Dedue explaining, step by step, what he means, why Dimitri may blame himself for Dedue's injuries... slowly, Grant stops scrubbing in favor of just watching Dedue, brows furrowed in concern and sympathy. It's... it's a lot. It's a lot that he doesn't at all regret asking about, but it's still a lot.

"I... I see." He suspects there's not much point to offering any kind of condolences; it's long past, and Dedue obviously doesn't regret it, in the end. "...And I see why you'd be worried about Dimitri blaming himself. Like you said, it's obviously not his fault, but... yeah, I wouldn't put it past him. Even if I can't imagine he'd want you keeping it from him, either."

Hell, Grant suspects he'd be inclined to hold himself responsible to some degree if someone got hurt so badly saving him, and his self-worth problems are nowhere near as bad as Dimitri's.