She plans to exact on Lum by kissing Ataru and stealing his youth.
As the series progresses, she begins to date her beloved Rei.
However, Rei's love for food and his shapechanging eventually caused Lum to call off the engagement.
She falls in love with Ataru after she misinterprets his "marriage proposal" (referring to Shinobu) as one for Ataru's childhood friend and classmate.
Until Lum showed up she was also Atarus girlfriend.
It was the top video game on the Billboard charts for more than a year, and inspired numerous sequels and ports across a variety of gaming consoles.
It is widely viewed as helping define the side-scrolling platformer genre.