The Knyazmaker

Side with Crake, and the question stops being who dies and becomes who rules next.

The rebellion, the Manumit, does not simply want Brencis gone. It wants a successor. Carrying Crake to the end of the month puts Coen in the position of deciding who wears the title.

There is a matching achievement, which is the reliable tell that this is a distinct ending rather than a variation.