These are the rules I am using to determine which Sim will be heir in any given generation of Last of Her Kind:
- Only mermaid Sims that can trace their lineages to Mia are eligible to be heir.
- If there is exactly one eligible Sim, that Sim becomes heir.
- If there are no eligible Sims, the youngest Sim that can trace his/her lineage to Mia will be made a mermaid using MasterController and will be heir. (Duck Notes: This is how Maya became both a mermaid and the Gen 2 heir.)
- The unlikely event that none of the Sims can trace their lineages to Mia will be considered a failure and end the legacy.
- If there is more than one eligible Sim, there will be an heir vote between the eligible Sims on this site, with the winner of the heir vote becoming heir.
- In the event of a tie in the heir vote, the oldest out of the tied Sims becomes heir.