I might be wrong, but it's not 10% and 15%. It's an additional 15%. That is, 25%.
If it weren't for the comment about "Why are you so small?"... Where did this Lunarian crawl out from?
However, the comment was insignificant. Fearing that the guest would die right at the entrance to the estate from some unknown illness, Ayko drags the stranger into the living room, puts her in a chair, and calls for Kilika.