Rison
The title of Rison is given to the designated heir to one of the great Clans of Colo. Typically, this is the oldest son of the reigning Ryuri of a given clan, but some clans do not require that the office of Ryuri be passed down through a single family line. Thus, some clans allow a Ryuri to designate an heir that is not a direct descendant of the current ruler.
