She's already been hurt the most. Sarah has the Toads, Annie has the Plantars. Both have had some sort of ongoing support system in place soon after they came into the Amphibia place.
Marie looks like she had no-one, or shucked them by the time we see her.
She is going to be in a very bad, no good, reasonably paranoid and isolationist mindset when we meet her. Possibly a very agressive masturbator since she has no way to release her stress outside of physical excercise of her abilities.>>112991421
So learn to draw.