Not sure if slime girls count but Cecilia Immergoop has potential.
>Slime girls can absorb water or digest food to get larger.
>Jiggly like jello.
>Body can be molded into whatever body shape she wants (ie pear or top-heavy).
>Built like Flubber.
>Play on words with Augustus Gloop, especially with how CC is also German.
I've never had a thing for slime girls before but the self-satisfied expression in this art is awakening something in me.