A Princess is an individual with a special power that can protect the stars. Princesses work alongside a Samurai and a Key Holder, forming a Trinity that protects the galaxy. The Princess duty is to find the Locker Balls.
Individuals who train to be Princesses start out with the rank of Apprentice Princess . The be initiated as an Apprentice Princess, a girl must find a Locker Ball of Fate (運命のロッカーボール,Unmei no Rokkā Bōru?) to use for a series of initiation rites using their Sixth Sense. The Samurai created from their first Locker Ball found will become that girl's Samurai of Fate (運命の侍,Unmei no Samurai?).After their Samurai of Fate is born, a girl officially becomes a Princess. Though they only have one Samurai of Fate, Princesses may be responsible for the birth of other Samurai too. Also, a Princess' Samurai of Fate does not have to be a Bushi, and they can be born without undergoing the normal ritual.
All Princesses serving in a castle are submitted to a Head Princess . One responsibility of a Head Princess is to select Bushi who complete training to undergo the ritual to become a Samurai. A Bushi chosen by her is said to have 99% of surviving the ritual seppuku and activating a Locker Ball.
Power of Fate (運命の力,Power of Fate?) - When a Princess is near their Samurai of Fate, her sensory powers are amplified.
Princess' Prayer (姫の祈り,Hime no Inori?)- Princess can empower her Samurai of Fate. By praying, she can boost her Samurai's speed and strength. Such prayers also purify a Samurai Soul, which multiplies its cutting power several times over.
It is for these gifts that many planets fight among themselves to acquire more Princesses and increase their number of Samurai. In battle, a common tactic is to kill a Princess as quickly as possible, as their death will cut their Samurai's power in half. As such, Samurai diligently guard their Princesses against danger.