|Class|| Ancient Ruler of Boo
Founder of the Boo Kingdom
|First Appearance||Super Mario: An Evil Rising|
|Family and Relations|
|Emperor, Your Highness|
The Emperor tries to come up with a way to stop the War Mage. Then, Luigi comes and decides to help him. After Luigi transforms the War Mage into the War Mage Sword, the Emperor keeps the sword and Luigi leaves.