Mouseft was an ordinary mouse who lived in an Ogre's castle in the Hazelnut Kingdom, until took a knife from a chest and became Supermouse. ("The Ogre & The Princess")
History[]
Mouseft had to scavenge to survive, and learned to avoid traps set by the "Giant" (an Ogre). One day he saw the Giant carrying Princess Gaea and followed them, and tried to help. (Prose: "The Origins of Super Mouse")
He helped the Ogre rescue Princess Gaea. ("The Ogre & The Princess")
In an alternate game path, he becomes the one to rescue the Princess and continues to adventure with her.
After death[]
Mouseft as a ghost, pumping ghost cheese out of the ground
After Mouseft's death, he became a Ghost Mouse and retired from his superhero work, becoming a Ghost Cheese driller. ("Boo!")