Their underdog status. Muggles in the Harry Potter world are seen as inferior in terms of power compared to wizards. So when a muggle is 'badass', it's like a David vs Goliath situation. They have to rely on their non - magical skills and wits to overcome magical challenges, which is really exciting to read.
The potential for character growth. A 'badass muggle' in a fanfic might start out as just an ordinary person in the muggle world. But as they get involved in the wizarding world, they learn and adapt. They might start to understand magic and use it to their advantage in a creative way, or they might inspire wizards to see muggles in a new light. This journey of transformation makes them very interesting characters in Harry Potter fanfic.
Chapter 239, "Changing Situation, Great Xia Special Envoy (Part 2)", is the clearest early answer because it turns Longyou's situation into a concrete plot event. The chapter turns that into something concrete by moving from If those 1500 people were all regular troops, plus one Hong Xia, and... to This is not right, Great Xia swiftly taking Wushuang wasn't because.... What makes it stick is that the chapter closes with "Great Xia must be well-informed about the current situation in Longyou.
Chapter 255, "Frenzied Fortune-Making, Dangerous Thoughts, Perfect Timing", is the clearest early answer because it turns Solidified Fire Oil's situation into a concrete plot event. The setup is The discussion on the details of the Solidified Fire Oil trade did..., but the pressure keeps building through It ended in just over an hour..
Chapter 278, "Thousand-eyed Demon Sheep, Terrifying Power, and Spiritual Medicine", is the clearest early answer because the rescue effort creates visible on-page results. The chapter turns that into something concrete by moving from Roar!" After the muscles all over the Demon Sheep's body stopped... to The two, who had narrowly escaped death, saw that it was Xia Hong who....
Chapter 299, "Troops at the Gates, Searching, Completely at a Loss (3)", is the clearest early answer because it turns Li Xuandu's situation into a concrete plot event. Early on, Third Brother, take twenty people to explore this tunnel, sort out.... By the end, From this draft map on the right, it appeared Great Xia had scrambled....
Chapter 252, "A Thousand Gold for a Steed’s Bones, Yang Li Surrenders", is the clearest early answer because it turns Long Mountain's situation into a concrete plot event. The chapter gives readers a real answer by opening on At dawn, on the first floor of Wushuang Main Building. and ending on Li Hu silently followed behind them, and soon reached the top floor,....
Chapter 269, "An Unexpected Surprise, Xu Ning’s Rapid Growth (Part 3)", is the clearest early answer because it turns Xu Ning's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Leader, take a look over here!" Xu Ning first reported the situation... and follows through with This time, I intend to visit Xing River!" Hearing that Xia Hong....
Chapter 315, "The Strange Cold Apple Trees and the Seized Silver Mine (2)", is the clearest early answer because it turns Xia Hong's situation into a concrete plot event. The chapter turns that into something concrete by moving from Sometimes heading east, sometimes west, suddenly diving down, and... to The length of its underground root was even more incredible,....
Chapter 245, "Cause and Effect, the Bigger Picture, Return to the Beehive", is the clearest early answer because it pushes Xia Hong into a new phase or setting. The setup is The sudden appearance of fifteen Cold Resistance Level members from..., but the pressure keeps building through But there was someone who was obviously not willing to give up!.
Chapter 348, "Zhu Ling in Dire Straits, Eight Camps Martial Contest, Betting Five Years—East Ridge Has Fallen!", is the clearest early answer because it turns Zhu Ling's situation into a concrete plot event. Early on, Just as Zhu Tong said earlier, if no action is taken to suppress.... By the end, We need to seize this martial arts competition opportunity to give....
Chapter 217, "Hesitation, Departure, and Sending Word", is the clearest early answer because it pushes Long Mountain into a new phase or setting. A useful checkpoint is the way the scene starts with Hive Station, Top Floor of the Main Building Above the spacious grand... and follows through with If we continue wavering like this, we will offend both Long Mountain....