Cloisters were used by the Sith Lord Odion to imprison all the children within his realm known as the Odionate, a region within the Grumani sector. Due to his unhappy childhood experiences and his hypersensitivity to the presence of other sentient beings in the Force, Odion wanted the children to live as hermits where he could not sense their presence. Odion had a dozen of these facilities built throughout his realm.