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

Hey, why is everyone so quick to criticize Isabel? I've forgotten some of the plot details, I only remember up to the campaign for the Warlock, so I don't recall her making any stupid decisions without a reason. Her initial mistakes, such as allying with the undead, waging war against the mages, and resurrecting the Greater Vampire, were also done out of love for Nicholas. :)