Shadow Wave

Both Shadow Wave and her sister love swimming. Especially in natural waters.
Her sister is sporty and cool whilst Shadow Wave likes to make potions out of plants like a witch.
Her specialized potions are water based and use sea / ocean plants. She deep dives to get her ingredients.

She made potions to help her sister do better in sports, they didn't realize this was cheating so when they got into trouble
shadow had to stop making them. Light Stream had to learn to train without the potions and Shadow started to feel useless without
being able to help her sister. After she encouraged Shadow to continue making different kinds of potions.