In your opinion, which hero has the most charisma in the campaign?

He was clearly not talking about hair color :3

I know. I just said that as an aside.

I explain Isabel's recklessness in this matter by the fact that she didn't know what Nicholas would become, although she should have guessed or did guess that something might not be right, but love played a role here. Besides, Markel managed to impose himself very strongly, cleverly playing on her emotions. Such a skilled strategist and psychologist, if you can call him that, should not be overlooked either. In general, I can even assume that Isabel became a victim of circumstances (yes, I'm kind of defending the Empress).
But what Railag did, I didn't understand. He had to conquer all of Igg-Shail for a woman. He doesn't look like a noble knight living by the highest principles, to put it mildly. The betrayal of Kha-Belekh can still be explained by Agaiel only considering his personal gain. But Railag probably had some other goals, who knows.

No, he was conquering Igg-Shail for himself. Despite his character, he is loyal to Malassa, and therefore he wanted to unite her homeland for her and for his own benefit. And only after that did he think about how many recruits he would have to hire to help Isabel in the war with the demons, with whom he also had his own scores to settle. And I will never forget the queen's stupidity! How could she make so many mistakes over and over again? If you can't run a country, don't try! No, she only realized this at the very end, although that is also doubtful. She most likely gave up the throne only because all of Igg-Shail and a new husband were waiting for her. Besides, she obviously finally started using her brain, realizing that the ruined and devastated Empire needed to be passed on to someone. "Here, Frida! It's a little messy here, but you're good, you'll fix everything." And then she disappeared. I have a guess where she disappeared to...