THE PATRONUS CHARM

                                    

                                          
Amelia pov
"What's that?" I asked Lupin.
"Another boggart," said Lupin, taking off his cloak. 
"I've been combing the castle ever since Tuesday, and very luckily, I found this one lurking inside Mr. Filch's filing cabinet. It's the nearest we'll get to a real dementor. The boggart will turn into a dementor when he sees you, so we'll be able to practice on him. I can store him in my office when we're not using him; there's a cupboard under my desk he'll like." 
"Okay," we said, trying to sound as though we weren't apprehensive at all.
 "So . . ." Professor Lupin had taken out his own wand, and indicated that Harry should do the same. 
"The spell I am going to try and teach you is highly advanced magic, Harry — well beyond Ordinary Wizarding Level. It is called the Patronus Charm." 
"How does it work?" said Harry nervously. 
"Well, when it works correctly, it conjures up a Patronus," said Lupin, "which is a kind of anti-dementor — a guardian that acts as a shield between you and the dementor."
"What does a Patronus look like?" said Harry curiously.
 "Each one is unique to the wizard who conjures it." I say. "Right?" 
Lupin nods, as Harry asks, "And how do you conjure it?" 
"With an incantation, which will work only if you are concentrating, with all your might, on a single, very happy memory."
"The incantation is this —" Lupin cleared his throat. "Expecto Patronum!" 
"Expecto Patronum," Harry and I repeated under our breath, "Expecto Patronum." 
"Harry first. Concentrating hard on your happy memory?" 
"Oh — yeah —" said Harry. "Expecto Patrono — no, Patronum — sorry, Expecto Patronum —"
A dementor rose slowly from the box, its hooded face turned toward Harry.  Harry pulls his wand out.Lupin opens a chest,and a huge black hooded dementor comes out.
The classroom and the dementor were dissolving. . . . I was falling again through thick white fog, and my mother's voice was louder than ever, echoing inside my head — "Not Harry! Not Amelia! Please — I'll do anything —" 
"Stand aside. Stand aside, girl!"
Stay Awake. It's not real. Don't pass out. You're Okay. 
~~~
"Get up, get up." Lupin says. 
Harry sat up slowly.
"I didn't expect you to get it the first time, would of been remarkable." He smiled. "Here eat this you will feel better." 
"What did you think about, if I may ask." 
"The day I I rode my broom for the first time..which was also the day I made the quidditch team."
Lupin frowned, "not nearly good enough. Have another memory?" 
"it's not happy exactly. It is but.. its kinda complicated." 
"Well, let's try again." 
Harry pulls out his wand again and Lupin opens the chest, and the dementors falls out out.
"expecto patronum."
It doesn't work
"Expecto patronum."
A stag comes out of his wand,it was really bright. I smiled. 
"Well done, Harry!" Lupin smiled. "well done!"