
Quick answer — Yuusuke Nagano voices Riquet in Promise of Wizard, Chris Fukunaga in Skip and Loafer, Shivata in Sword Art Online the Movie -Progressive- Scherzo of Deep Night and 4 more characters.
Yuusuke Nagano voices Riquet (Promise of Wizard), Chris Fukunaga (Skip and Loafer), Shivata (Sword Art Online the Movie -Progressive- Scherzo of Deep Night), Ayumu Niibori (A Whisker Away), Eiji Higa (The aquatope on white sand), Kaine (Mobile Suit Gundam GQuuuuuuX), Umeharu Magi (Dekin no Mogura: The Earthbound Mole).
Riquet is voiced in Japanese by Yuusuke Nagano.