She doesn't answer that part, though he's not expecting her to. Probably for the best. His own personal lines are a complicated matter, occasionally mutable, and it's a large reason why he often does not explain himself. He knows who he is. Whether others do, or are willing to know, is not something he chases after.

He starts to wipe the blood off his dagger with a scrap of cloth. Habit, and for something to do while he listens.

"You saved him."

He remembers what Dean said. So I went and got her killed.

Yeah. He can fathom why Dean sees it so. When it comes to things like this, truth has no bearing, in the same way he both understands Renfri's death was her doing as much as his, and yet he still feels a certain weight from it decades later.