
Quick answer — Tetsuya Yanagihara voices Mikuri in Natsume's Book of Friends Season 1, Mokku in Erin, Yeager in Yu-Gi-Oh! 5D's.
Tetsuya Yanagihara voices Mikuri (Natsume's Book of Friends Season 1), Mokku (Erin), Yeager (Yu-Gi-Oh! 5D's).
Mikuri is voiced in Japanese by Tetsuya Yanagihara.