Just another boring day, Ella is super tired so she goes to take a hot shower to wake up!
3 years later
As she showers, Ella realizes she's shrinking! She looks down and notices a puddle of herself on the floor. She quickly plugs the drain and leaves the shower. Ella starts scooping herself into a bucket, hoping to fix it!
Ella goes to the doctor, hoping for an answer. The doctor tells Ella she'll do everything she can. Ella isn't very reassured, and starts sobbing. Her worst nightmare has come true, she's short!
3 years later, Ella has made a routine out of her ability to change states of matter.
Ella now only takes cold showers, this way, her particles don't gain energy and she doesn't liquify. She's very careful to only go outside when it's cold now, and when it's warm, she tries to stay in the shade. She eats only cold food to keep her insides from melting (she learned that lesson the hard way)
Ella has also learned to use this ability to her advantage. When she get's into trouble, she just heats herself up, and vaporizes into thin air. Then, she gets into a cold area and reshapes into a solid. She has to be very careful to keep all of herself together though. as she doesn't have a definite volume as a gas.