Whenever the topic of a conversation is the shonen anime villains, the antagonists from the One-Punch Man series deserve to make it to the conversation as One-Punch Man has some of the finest villains for recent shonen anime franchises. What makes the villains in the OPM series amazing are their unique character traits and strength. The villains play a crucial role in the story of OPM as the series revolves around a rookie hero Saitama who is insanely strong and is leading a life of boredom as he is unable to find an opponent who could match his strength and give him a decent fight.