
Quick answer — Kenichi Matsuyama voices Galo Thymos in Promare, Makoto Hokazono in Detroit Metal City, Jealous in Death Note: Relight.
Kenichi Matsuyama voices Galo Thymos (Promare), Makoto Hokazono (Detroit Metal City), Jealous (Death Note: Relight).
Galo Thymos is voiced in Japanese by Kenichi Matsuyama.