Somebody, either at Sega or Bandai Namco or even Yoko Taro, decided that the best way to anthropomorphize the concept of the video game Pac-Man was that of a constantly hungry teenage girl that turns into a giant woman that steps on you before eating you. Somebody looked at the fetish menu and checked a bunch of boxes.
EDIT: I just realized she has two ghosts chained to her neck like prisoners, so add another check.
