She is the wife of Mario. She became the owner of the Mushroomverse. Mario fears that liberals will attack her castle. She may be weak, but she is considered one of the strongest characters due to being such a big leader. She now has people at the edge of the universe to guard, and their jobs are to view criminal records.
She used to be married to Lego Mario, but the relationship didn't work out, and she cheated on him with Blue Toad. She took his virginity. Lego Mario after hearing about it, knocked her out. This saved time for a zombie to eat her. A rock Mario made had brought her back to life.