Like a Master, a Slave Master shares a life with its protector. Instead of otomes, they have a Slave Monster and they do not need a contract to materialise them, as Slave Monsters do not materialise. The Slave Master has to call the Slave Monster by using the Slave Crystal and give a pledge to the God of Wisdom, that they believe in his wisdom, and to call out a loyal slave for them. A Slave Master must always listen to the Slave leader, who is John Smith in My-Otome.