
Quick answer — Mutsumi Sasaki voices Hajime Usami in My Dress-Up Darling Season 2, Biwamaru in Dororo, Abuhachi in Megalobox and 1 more characters.
Mutsumi Sasaki voices Hajime Usami (My Dress-Up Darling Season 2), Biwamaru (Dororo), Abuhachi (Megalobox), Burroughs (Mobile Suit Gundam Thunderbolt).
Hajime Usami is voiced in Japanese by Mutsumi Sasaki.