The change in her voice and way she relaxed helped let Maru know that he was amazing and his cuteness had saved the day. It probably hadn't really, but he was glad that Madoka wasn't feeling as anxious as she had a moment ago.

He gave one more nuzzle before he yawned and then snuggled down within her arms.

Yes. This lazy, sleepy kitty was going to help Madoka fight. So that meant he needed all the sleep he could get, clearly.