Mill is the princess of one of the empires in the fantasy world (Either Bestool or Bartonian). She is very outgoing and childish, and seems to have abandonment issues over Maze. She is obsessed with both Mazes and often outlines her plans to marry Maze (but always with the female one), have Maze's children (with the male one), etcetera. Her family was killed when the Jaina holy group took over her family's territory. She also has the power to summon Dulgar, one of the greatest Demi-Armors (equivalent of a mech) in the entire world, which only Maze has the power to pilot. In the manga 'she' is actually a hermaphrodite. (Source: Wikipedia)