Warning! Spoilers for One-Punch Man Chapter 140 ahead!
Hellish Blizzard, aka Fubuki, has been a fan-favorite character in the One-Punch Man manga for years, but it's only in the latest chapter that she's really begun to demonstrate the qualities of a true hero. Ever in the shadow of her older sister Terrible Tornado, aka Tatsumaki, Fubuki has spent much of her hero career trying to be a big fish in a small pond. Despite the fact that she's more than qualified to move on, Fubuki has preferred to remain the top hero in Class B. After all, Fubuki knows she'd never be able to match her sister, so isn't it better to be Class B's #1 rather than Class A's bottom rank?
Following the absolute destruction of Tatsumaki's planet-shredding attack on the Monster Association, one might expect Fubuki's inferiority complex to come roaring back. However, from hanging around with Saitama and seeing the other Class S heroes finally come together and start working as a team, Fubuki has grown enough to realize that she has value, independent of comparisons to her sister. There's even one glaring area where Fubuki has begun to outshine Tatsumaki, and that's in leadership ability.
In Chapter 140 of the manga, Genos' power source has begun to overload, potentially resulting in a nuclear explosion, right in the middle of the assembled Class S heroes. While he tells them to flee in the hopes that his self-destruct can at least take out the surviving monsters, the others desperately try to come up with some alternative plan. Of the heroes most able to help, Child Emperor is missing and Drive Knight has deliberately abandoned Genos to return to his own base, leaving no one with the technical knowledge to prevent the impending disaster. That's when Fubuki steps forward, and determined not to let such a valuable hero throw away his life, begins to use her psychic powers to solve the problem. She has no way to be sure this will work, and fully expects that failure could cost her life as well, but she's changed enough now to be willing to take that risk, as a good leader should.
Fubuki's first appearances involved her leading a fan club and trying to coerce Saitama into joining her "Blizzard Bunch," threatening to act as a roadblock to further promotions if he refuses. Fubuki's followers are soon wiped out by the extremely NSFW monster Do-S, while Fubuki is helpless to do anything about it, and once again she is only saved thanks to her sister's psychic connection. Since then, she's mostly tagged along with Saitama, Genos, and King, insisting she's still a leader while doing absolutely nothing to prove it. The incident with Genos in this chapter allows her a chance at redeeming herself rather than repeating the mistakes of the past. Not only is she successful, but she also manages to win the admiration and respect of Bang and the other heroes present. Her powers may never match Tatsumaki's, but they don't have to for her to still have a role to play, and she's finally realized that.
With both sisters having scored some very cool moments in recent chapters, one can't help but wonder if Tatsumaki might at last show Hellish Blizzard a little respect, too. The Class S heroes learning to work together and becoming a team has been a major theme of the Monster Association arc, and bringing the psychic sisters a little closer together would be the cherry on top as far as character development goes. Although One-Punch Man chapters are released on an irregular basis, the next chapter is sure to be highly anticipated.