WARNING: The following article contains spoilers for One-Punch Man Chapter 101 by ONE and Yusuke Murata, available now in English from Viz Media.
Do-S, a monster who dresses like a dominatrix, has been one of the biggest thorns in the side of the Hero Association. Using her whip, she's able to mind control those whom she inflicts pain on, which has led to a lot of heroes and humans fighting their own. Chapter 100 of the manga saw Amai Mask -- the top-ranked A-class hero -- joining the fray in order to protect Iaian, Bushidrill and Okamaitachi from her and her army of mind-controlled mercenaries. As he appears to be immune to her special ability, it's no surprise Amai Mask destroyed Do-S, but he does something quite monstrous in the process.
Do-S offers to free the mercenaries -- who were sent by Hero Association donor Narinki in order to rescue his son from the Monster Association -- if Amai Mask goes "someplace private" with her and gets "cozy." However, Amai Mask says he doesn't make deals with monsters, and he starts to subtly transform, with his eyes going bloodshot and his veins popping. As the mercenaries approach, Amai Mask butchers them in stark contrast to his prim, proper and people-pleasing facade, with some panels framing him more like a monster than a human being. Do-S begs for Amai Mask to spare her, but the hero shows no mercy, killing her off-panel.
Amai Mask killing Do-S despite her pleas isn't particularly surprising. She's a monster, after all, and she's never shown any remorse for her actions that would indicate she'd want to change her ways in the future. Plus, Amai Mask has made clear he has a zero-tolerance policy when it comes to monsters and evil. However, killing the mercenaries is pretty questionable, as Do-S makes clear they can still be freed. Rather than attempting to save them or spare their lives, Amai Mask butchers them. Considering just how much stronger he is than them, it doesn't seem impossible that he'd be able to find a way to keep them alive, but he chooses not to do that, instead, acting in a way more befitting a monster than a hero.
Amai Mask has definitely displayed narcissistic, elitist traits in the past, and he's even committed some pretty brutal acts, killing the caveman Suppon despite orders to the contrary. However, the hero's violence in Chapter 101 is directed at humans who are unable to control themselves. The battle between Amai Mask and Do-S thus raises a question as to whether the human heroes are secretly just as brutal as the monsters that they claim to be protecting the world from.
One-Punch Man Chapter 102 releases Sept. 25 from Viz Media.
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