Saitama is one of the most overpowered anime characters that comes to my mind. There is no enemy who has got him to go all out or be called his equal in any way. He is so worried about using his full power that he holds back. Who knows what his true potential is in the scope of things? That is why, having the second season could enlighten the viewers in more information as the episodes air on screen. Who believes actually that his power came as a result of doing 100 push-ups and other exercise sets of 100 to reach his power potential. Literally, he is so overpowered there is countless debates on the Internet of him being the strongest or not.