
Quick answer — Ooki Sugiyama voices Proto in Ghost in the Shell: Stand Alone Complex 2nd GIG, Taiki in Windy Tales, Maroro in Utawarerumono The False Faces and 2 more characters.
Ooki Sugiyama voices Proto (Ghost in the Shell: Stand Alone Complex 2nd GIG), Taiki (Windy Tales), Maroro (Utawarerumono The False Faces), Tetsuya Gouda (Star Driver), Karias Blerster (Noblesse).
Proto is voiced in Japanese by Ooki Sugiyama.