Kakashi, whether unfortunately or fortunately remained to be seen, wasn't looking at Nagato's face.. but that changed when Nagato finished speaking, and Kakashi turned to look at him, settling a little more and exhaling a slow breath through his nose.

The rinnegan was definitely a surprise, but he could hardly bring himself to comment on it in such a situation as this, when Nagato was sharing painful details.

"I heard.." he said slowly, picking his words carefully. "Too many good lives were spent back then."