
Quick answer — Kouji Hiwatari voices Onyankopon in Attack on Titan Final Season THE FINAL CHAPTERS Special 1, Klein in Fresh Precure!.
Kouji Hiwatari voices Onyankopon (Attack on Titan Final Season THE FINAL CHAPTERS Special 1), Klein (Fresh Precure!).
Onyankopon is voiced in Japanese by Kouji Hiwatari.