[Papyrus would love to hear that, and yet, if Hades hasn't met Sans yet, there's still cause for anticipation: which of the two skeletons would be his most favorite? (Papyrus, of course, but one never knows until they know.)]

Oho. A new roomie, with an intriguing question... No, no, they're fine. Maybe they startle me when they appear out of nowhere, but that's nothing to do with being mice or rats.