
Quick answer — Satoshi Niwa voices Ho-Bin Yu in Viral Hit, Saotome in You and I Are Polar Opposites, Haraoul in Helck and 2 more characters.
Satoshi Niwa voices Ho-Bin Yu (Viral Hit), Saotome (You and I Are Polar Opposites), Haraoul (Helck), Matthews (Leviathan), Shuuji Nihonyanagi (Tasuketsu -Fate of the Majority-).
Ho-Bin Yu is voiced in Japanese by Satoshi Niwa.