Maya is Mint's younger sister and princess of the East Heaven Kingdom. She's also the heir to the throne to become the future queen of the kingdom. Maya is the current holder of the Book of Cosmos, East Heaven Kingdom's relic.
While Mint is lazy, violent and bad mannered, Maya is the exact opposite. Maya is serious, wise, prideful and graceful.
Throughout the story of the game its seems Maya and Mint despise each other and bash on one another whatever it is possible. However, although they do not see eye to eye and does not agree on same subject the two do cared about each other in their own special way.
Maya alongside with Doll Master talked to the council to prevent Mint from becoming the future queen of the kingdom, due to her inappropriate behavior for a princess. Mata decided that as future queen Mint will have to obey her rules or otherwise she'd have to forced her to starting with feeding her with pumpkin and making her life miserable.
While Mint ran away to search for Velan's relic, she and Doll master made sure they're one step ahead of Mint to ansure she won't break the seal. However Maya was played by Doll Master who intended all this time to break the seal and resurrect Velan using the Dewprism. Maya was in that time locked away while Mode Master impersonate and causing disaster at Carona Town for the search of Prima Doll.
In the end of both endings of the game a secret ending is unlocked at which Maya alongside with Rue, found another doll created by Velan and what they shall do with it.