She is believed to be the daughter of Queen Jaydes and King Grambi, and she runs away a lot to escape her overprotective parents. She does not know why her parents are so protective, but it is later revealed that she is really a Pure Heart; Jaydes and Grambi transformed her from the Pure Heart into a living form to protect it, as "no one would suspect" a Nimbi to be a Pure Heart (though Bonechill did somehow find out about Luvbi's actual form). They admit that, over time, they grew to love Luvbi and felt as if she was their real daughter. Luvbi speaks in Early Modern English (as do all Nimbis), and is constantly putting others down, namely Mario, Princess Peach, Luigi, and Tippi.