Ambassador

By the way, no one forbade Lorenzo. The game only allows you to choose two guest heroes in the tavern from a selection of 5, and Lorenzo is among them.
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The situation with Lorenzo was as follows. After capturing the dwarf city, there were two heroes in the tavern. I bought both. I "fed" one to the dwarves, and Gabriel remained until the end of the game. The next day, only one hero, Valeria, was in the tavern. A week passed, and the tavern still had the same hero. Another week passed – again, only one hero (Valeria). For a month, Lorenzo was not found. Apparently, it was the game's doing.