Luciana's Father was the king that Queen Ariana mentioned when Luciana said she wanted to marry someone who loves her as much as she loves him. Ariana didn't love Luciana's father when they got married. Ariana and the father were married on a Sunday. Then the father died on a Wednesday, shortly after he and Ariana married. Ariana seemed to be happy about this when she sang "Sunday we were wed. Wednesday he was dead. Happily that put an end to us". He died before Ariana even had Luciana. So Luciana never met her father. According to Ariana's song Love Is For Peasants, he was the oldest king she could find and his heart's condition was a plus. That could explain how he died.