Futako no Ani (双子の兄) is a supporting character in Natsume's Book of Friends: Nyanko-sensei & The First Errand, voiced in Japanese by Hidenosuke Kawashiro. The series' music includes "Natsume Yujin-cho - Opening 1 | Issei no Sei", "Natsume Yuujinchou Ending Song 1".
