As Hanna is walking along the beach, all of a sudden Fiery Fred shows up. Both Hanna and Fred have matter-changing powers, so they're constantly butting heads about who's more important.
Just as Hanna is about to leave the beach, Fred shoots a fireball at her. She responds by putting up a wall of ice. The ice is frozen and just on kind of a liquid that's a state of matter. In order for her to be able to produce the ice, she'd have to put out enough water and freezing temperatures for it to freeze. Fiery Fred was able to produce a fireball because he could make enough heat to react with a gas in the air to make a flame.
Just as the battle is starting to escalate, Hanna makes a large wave. She directs the wave, so it will crash right on top of him. She created this wave by making enough wind. She used the wind to raise the water up and make it crash down.
She then ran and hid behind a sand dune. She used her activation energy to start running, and then she stopped with deceleration.
All of a sudden, Hydra Hanna jumped up and fired a shot of water at him.
He leaped up and was able to dodge the shot. He was able to leap up because of his potential energy stored, becoming kinetic energy. Finally, she was able to defeat him by crashing a large wave on top of him. She was finally going to be able to relax for the day and store more energy for future battles.