I might need 2 voices for Saitama. A "Back-up" just in case the other is not available.

This is the MC of OPM. Saitama is a 25 year old Hero for a hobby and is so strong that he can kill his opponents in one punch. Despite his immense strength that rivals Superman, he's a pretty laid back dude. He's constantly saving the world from villains who can destroy the world and defeat even the toughest heroes out there.

He is what makes this series. His character desin can go from blank, dull, plain, uninteresting, derpy expressions at points. However, when things get's serious, he is shaded in and can look like a real badass who you don't want to mess with.

Saitama should sound laid back and calm. His tone can also sound a tad bored whenever he is in his "blank" state. Also, when he gets serious, he sounds strong and commanding, even a bit cocky too. He knows what he is capable of, so don't forget to sound confident without being braggy when doing his voice.

Use the trailers or look up his japanese voice actor for reference. If you want to go the extra mile, you can say more lines from the manga/webcomic if you want.