Who is the seiyuu of Aya in Mushishi? Who is the seiyuu/voice actress of the young Aya in Episode 17 of Mushishi? I want to know because I think she sounds like Naru Kotoishi from Barakamon.
Tsuzurahara Miyu, apparently.

Incidentally, AnimeNewsNetwork tends to have very comprehensive listings of voice actors and staff, so that's always a good place to check if you have a question like this in the future.