Leader - builder

I recently started playing, I have already lost 7-8 people from the community, now 6 are alive, for the entire passage and all the characters that exist and who died were the leaders of the sheriff, commander and builder and not once, but the merchant never, is it possible how -something before hiring a character in the community by traits to determine what kind of leader he will be or not, is it random? I made a mistake in the name - leader: merchant