One Punch Man is an action manga series featuring characters with escalating power levels. Saitama, the protagonist, is overwhelmingly strong, defeating opponents with one punch, while other characters like Tatsumaki, Garou, and Boros possess incredible abilities and contribute to the series' complex plot. The episode describes several key characters, both heroes and monsters, highlighting their unique powers and affiliations. Many characters show immense strength, often capable of city-level destruction, leading to debates about who is the strongest. The series also introduces a mysterious entity, God, whose power surpasses even the strongest heroes.