The reason could be that the hero has a change of heart and realizes that the demons aren't as bad as they seem. Or it could be a strategic move to gather intel and ultimately defeat the demons from within. Maybe the hero's sense of justice leads them to believe that joining the demon army is the best way to bring about real change.
Maybe it's for some hidden purpose or a unique mission. The hero might have seen an opportunity to achieve something greater by joining the demon army that others don't understand.
It could be that the hero was deceived or manipulated into joining. Or perhaps there's a deeper connection between the hero and the demons that hasn't been revealed yet. Maybe joining the demon army is the only way to save someone or something important.
Chapter 935, "Gu Pansheng's Grace [Extras: Protagonist's Edition]", is the clearest early answer because it turns Mom's situation into a concrete plot event. It opens with I sat on the sofa, seriously saying, "Little sisters are so adorable. and closes on I widened my eyes to her..
Chapter 584, "The Wealthy Young Master Renounces Worldly Life for Love", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with There wasn't a mirror on the small boat.
Chapter 714, "I'm Using Voice Input", is the clearest early answer because it turns Ming Yu's situation into a concrete plot event. Early on, Jiang Li looked at Jiang Mingyu, who appeared deeply hurt, and.... By the end, The person was sending her baffling messages and even called to....
Chapter 670, "Sister Will Support You", is the clearest early answer because it turns Jiang Shixu's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Li, sensing that something might have gone wrong, quickly used...
Chapter 588, "Looking like this, he must be a male model in a bar!", is the clearest early answer because it turns Sister Bai Lu's situation into a concrete plot event.
The best chapter pointer here is Chapter 2, "What Kind of In-laws Are They?". It opens with On the top floor of the Financial Building, a gathering of dark clouds... and closes on Jiang, Lin Manru, turned pale and quickly explained, "It's not eloping, my....
Chapter 763, "It must be Jiang Li who tied her up!", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. It opens with But within a short time, she sensed that something was off.
Chapter 769, "Su Yinwan Gets into Trouble!", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event.
Chapter 702, "This is One Hundred Million, Sign Here!", is the clearest early answer because it turns Wu Daoshan's situation into a concrete plot event. It opens with Bai Lu was at a loss for words. and closes on People passing by the office also heard the considerable noise..