@HYBRID_BEING
Yeah "sit a spell" isn't a common idiom anymore, mostly just used by older folks. Yotsuba will break out with an older folk's idiom or way of speaking from time to time(likely influenced by her grandmother).
@Sakunontanu
Well she does have over 16 years of big sister experience!
Asagi is great though. In her +16 years as a big sister, she's mastered how to comfort her little sisters(like this chapter) and the best time and ways to lovingly tease them.
Except with Fuuka. It's Asagi's rule that...