It's a strange, and actually very awkward role reversal. Lazarus is used to being the one doing the apologizing and working to figure out a way to fix things and make them better, and his eyes widen in surprise and confusion when Misa gets down on her knees in front of him.

It's odd and uncomfortable. He's said that he's sorry so many times in his life that he actually has no idea to react when someone is repenting this way before him.

"I forgive you," he says quickly, even though he hasn't realistically had the time to think it over. "I understand why you did what you did, you... really don't have to sit that way, like you're..."

Begging, or praying, or waiting for an execution.