Runolf mentions that they left something for you nearby, adding that it will be quite useful. When you start to thank them, they leave without another word.
You're surprised that Runolf remembers each tiny detail and time of various events. You never focus on those things, but at least someone does!
Runolf informs you that they're counting the exact amount of steps it takes to get to their favourite napping spot. They don't say why, but they seem quite invested.