Concentrate on your heart, your soul, feel what your spirit wishes to become
Harry knelt in a circle of moonlight. Around him, the giant trees of the Forbidden Forest rustled, the inhabitants of the canopy curious about the intruder.
To become a form other than your own, you must focus on the deepest desires of your heart. You supply the structure of the mind, the magic supplies the body.
Harry could feel his bones shifting, thinning, his body changing.
The most difficult part of an animagus transformation is maintaining focus. Once the change begins, you must not lose focus, or both forms will be lost, and with no anchor, your soul will drift. In other words, you will die.
The changes slowed, then stopped. Opening his eyes, Harry felt dizzy, but human.
It takes time to complete the change. The closer you get to the actual change, the more it feels like you have changed. Sometimes you will feel as though you have completed the change, but upon opening your eyes, you will be the same as before.
Harry looked at his hands. Well, they were still human. Perhaps he would manage to complete the change tomorrow night.
Standing up, his center of balance skewed by the dizziness of the attempt. He felt tired, and not completely at home in his own skin. Grabbing up his invisibility cloak, he swirled it around his shoulders and headed back to the castle.
Sneaking back up to his dorm, he entered the bathroom, removed his glasses, and splashed some water on his face. Blinking away the moisture he looked at himself in the mirror. Then he reached for his glasses, a slight look of disbelief on his face.
Staring back at him was a rather pretty girl, about his age, with short unruly red hair that had a jagged white streak running through it.
He leaned closer to the mirror. The girl leaned closer. He reached up a hand. The girl reached up a hand. It was at this point that Harry realized his hand looked just like the one in the mirror.
Your Animagus form will take the form of your spirit, your soul.
Wouldn't the wizarding world be surprised that The-Boy-Who-Lived has the soul of a woman.
