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

Hey everyone, could you please answer a question for me? I finally finished the fifth installment of Heroes of Might and Magic, but here's the problem: after I defeated Kha-Beleth, a cutscene played that ended with Zephyr teleporting everyone from Shi'o. And then, I assume, they were supposed to show another cutscene, hinting that Biara was pretending to be Isabel. But instead, it just offered me to fight Kha-Beleth again and didn't show anything. So, what happened at the end, and where did Isabel go? Also, what happened to Faidaen, Zephyr, and Railag? I understand what happened to Godric. If there are any spoilers about these three in the campaigns of future expansions, please don't tell me!) Otherwise, it won't be as interesting.