>>77424284>Becoming an immobile shield generatorNah, that's boring.
Way I've figured it, the properties of her forcefields change as she's packing weight on. They become pliable enough to function as constructs and bouncy enough to send anything thrown at them back even harder.
With how much forcefield energy she puts out and how she keeps outgrowing things, she stops bothering with proper supersuits. A bikini and her protective layer of purple construct energy is all she really needs to stand up against enemy fire and it adds an extra spring to her hefty step.
Her growing fame and vanity is what makes her keep to a specific endpost in her ass quest. Can't really swagger those hips and jiggle that ass if you can't walk. Latent superstrength genes from dad give her a better carrying capacity then most and helps support the huge breasts and belly she's also gained in her ass pursuit. Gives her extra height then most as well. Wearing her forcefield energy constantly eventually starts affecting her complexion and she finds her flab has become as bulletproof and reflective as the forcefields she wore over them were.
All that time long ago, she just wished to be normal and somewhat curvy. Then she grew up to be a towering purple fertility goddess idol of a woman with a car sized ass. And between that and being able to shield the entire city, she starts living up to the goddess part