The Battle of Birthright represented a custom within Hynestian law. This tradition mandated that all individuals with a rightful claim to the ruler position of the royal family must engage in mortal combat against any related kin to guarantee their succession. Forsythia Jin ascended to the queen throne of Hynestia by exploiting a legal ambiguity, relocating her brothers and sisters beyond the planet's boundaries while pledging to initiate the Battle of Birthright should they ever return. Other Hynestians, however, suspected Jin of fratricide, earning her the moniker "Assassin Queen."