Shape Shifters in Training

Primary School years were tough.
It was difficult for me to harness my powers....
So many times did my emotions change.... and so many times did I shape shift, (out of sight of anyone, of course).
The first year of Primary, Prep, we got buddies.
My buddy was a 12 year old girl named Sharkia, who looked more like 16, but was a very friendly person. Hiro and I had to share a buddy. This pleased us.
We relied on her heavily.
One day, the school bullies approached us.
"Hey Sharkia."
Sharkia glared back.
One of the bullies kneeled down to us and said,
"Careful, kiddies. Sharkia is like a shark. She might bite you."
Sharkia growled. She picked Hiro and I up and ran away.
The bullies followed us.
We got to an area that no one hangs around.
"Haha, scared Sharkia. That's new! HAHAHA!" they laughed.
Sharkia put us down and growled loudly, and, to the bullies amazement, and ours, she shape shifted into a shark!
Sharkia the Shark stared at us sadly.
The bullies were speechless.
They fled like cowards, screaming, "SHARK! AAAAHHHHHHHH!!!!"
Everyone thought they were delirious.
Sharkia turned back into a girl.
"Are you afraid?" she asked, looking like she was about to burst into tears.
Hiro and I exchanged glances, grinned and shape shifted.
Sharkia smiled. "YAY!!"