Amateur_Heroine
You might be able to get away with saying that Rachel is a super heroine but she is certainly... new at it. The scientist who did this to her tends to provide material support as she learns the ropes. Still, she finds herself in a situation where on Monday she had 0 super powers. On Tuesday she somehow had to learn how to control powers of: Transformation, teleportation, size and dimension changes and even some telekinesis.
Needless to say she's not able to reliably control any of those powers yet and so occasionally causes backfires or completely unexpected effects from her attempts to use any powers. As soon as she is ready she's going to hit the streets and perform her crime-stopping duties. Hopefully the baddies don't just come and find her before that can happen...
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Looking for all kinds of interactions:
All sorts of transformations
Vore, of course
Smothering
Bondage
Quicksand/burial/entrapment
Webbing/Wrapping/Engulfing/Absorption
General mocking, teasing and humiliation
Being in over her head/being helpless
Bad ends are always fun.