Jack's POV

Hermione figured what Uncle Remus is. But she promised to keep it secret. Harry and Ron have noticed him looking ill. But they haven't figured out what he is.

Anyway today Harry is having his first patronus lesson. He and I are walking to Uncle Remus' class room. "So tell me more about this Patronus charm" Harry tells me.

"The incantation is Expecto Patronum and it literally means 'I await a guardian'. It is an ancient and mysterious charm conjures a magical guardian. A projection of all your most positive feelings. The Patronus Charm is difficult, and many witches and wizards are unable to produce a full, corporeal Patronus. Aguardian which generally takes the shape of the animal with whom they share the deepest affinity. You may suspect, but you will never truly know what form your Patronus will take until you succeed in conjuring it" I explain.

"Can you produce a corporeal patronus?" he asks me.

"I believe so, but I've never tested it though. It happened so fast on the day of the match. I didn't see the animal" I tell him.

"How do you conjure it?" he asks me. "Do you just say the incantation?" he asks.

"No, there's more to it" I tell him. "You need to think of a real happy memory, the happiest you can think of. The stronger the memory, the stronger the patronus" I explain.

"So what does a non-corporeal patronus look like?" he asks me.

"A silvery shield" I tell him. We arrive at the classroom and go inside. The room is dark and empty. So I lit the lamps with my wand as Harry sat on a desk. We waited only five minutes when Remus turned up, carrying a large packing case, which he heaved onto his desk.

"What's that?" Harry asks him.

"I'd say a boggart" I say.

"You're correct Jack" Remus says smiling. "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" he explains.

"Brilliant uncle" I say smiling.

"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" he tells him.

"I figured, Jack was explaining the charm on the way here and how it works" Harry tell him. "He says it turns into an animal, but what does the animal look like?" he asks him.

"It is unique for each wizard who conjures it, but each animal looks like a silvery ghost. Jack why don't you demonstrate?" Remus suggests. I nod my head and draw my wand thinking of a happy memory.

"Expecto Patronum" I say waving my wand. A silvery doe shots out of my wand. "Wow" I say in awe as it pranced around the room. It came over to me and bows it's head before disappearing.

"Awesome" Harry says and Uncle Remus smiles at me.

"Ready to try Harry?" Remus asks him. Harry nods his head drawing his wand.

"Expecto patronum" he says.

"Focus on the happy memory" I remind him.

"Right" he says and says "expecto patronum". He says it twice before something whooshed suddenly out of the end of his wand; it looked like a wisp of silvery gas. "Did you see that? Something happened!" Harry says excitedly.

"Very good" I praise with my uncle.

"Right, then -- ready to try it on a Dementor?" Remus asks.

"Yes" Harry says while gripping his wand tighter.

"Jack be on stand by" Remus tells me. I nod and stand behind Harry wand at the ready. Lupin grasped the lid of the packing case and pulled.

A Dementor rose slowly from the box, its hooded face turned toward Harry. One glistening, scabbed hand gripping its cloak. The lamps around the classroom flickered and went out. The Dementor stepped from the box and started to sweep silently toward Harry. Drawing a deep, rattling breath.

"Expecto patronum! Expecto..." Harry starts to fade.

"Expecto Patronum!" I shout and my doe rams the boggart back into the case. I catch Harry before he falls as Remus put the lid back on the case. "Harry, wake up" I say as Remus relight the lamps. Harry wakes up and I hug him tightly.

"Are you alright?" Remus asks him.

"Yes" Harry says as we stand up.

"Eat this before we try again. I didn't expect you to do it your first time; in fact, I would have been astounded if you had" Remus says handing us each a chocolate frog. I eat mine happily.

"It's getting worse" Harry tells us. "I could hear her louder that time -- and him -- Voldemort" he explains. I wrap an arm around his shoulders.

"Harry, if you don't want to continue, I will more than understand" Remus tells him.

"I've got to! What if the Dementors turn up at our match against Ravenclaw? I can't afford to fall off again. I can't constantly rely on Jack to save me. If we lose this game we've lost the Quidditch Cup" Harry states.

"You might want to select another happy memory. That one doesn't seem to have been strong enough" I tell him. He nods his head and stands in front of the case wand at the ready. Remus and I get into our positions. Same result as last time I drove the boggart back into the case again.

"I heard dad" he tells me. "That's the first time I've heard him" he states. "He told mum to take us and run. He tried to take on Voldemort alone" he explains.

"You heard dad?" I ask sadly, I always felt closest to dad. Because of all the stories Uncle Remus told me about him.

"You heard James?" Uncle Remus asks.

"You didn't know our dad, did you?" Harry asks.

"Harry how do you think he became my godfather?" I ask him.

"We were friends at Hogwarts. Listen, Harry -- perhaps we should leave it here for tonight. This charm is ridiculously advanced. . . I shouldn't have suggested putting you through this" Remus states.

"I'll have one more go! I'm not thinking of happy enough things, that's what it is. . . hang on" Harry tells him. He thinks hard and seems to settle on another memory.

"Ready?" I ask him and he nods his head.

"Concentrating hard? All right -- go" Remus says opening the case. The Dementor rose out of it; the room fell cold and dark.

"EXPECTO PATRONUM! EXPECTO PATRONUM!" Harry screams. A huge, silver shadow came bursting out of the end of Harry's wand, to hover between him and the Dementor. The shield pushed the dementor back into the case and Remus shuts it in.

"Excellent, Harry! That was definitely a start!" Remus cheers as Harry sits down. I sit beside him and Remus walks over to us. He handed us each a large bar of Honeydukes' best chocolate. "Eat the lot, or Madam Pomfrey will be after my blood. Same time next week?" he asks. Harry agrees.

"Professor Lupin?" Harry asks him before we leave. "If you knew my dad, you must've known Sirius Black as well" he says.

"What gives you that idea?" Remus asks giving me a pointed look.

"Nothing -- I mean, I just knew they were friends at Hogwarts too" Harry tells him. Uncle Remus face relaxes.

"Yes, I knew him" he tells Harry. "Or I thought I did. You both had better be off, Harry, it's getting late" he tells him. I grab Harry's arm saying goodnight to my uncle. Before taking Harry back to our common room. I go over to Hermione and start to to my homework.

Honestly I'm getting a little tired with all the extra classes. I plan on dropping a couple so I can have a normal schedule next year. I want to drop divination, but I doubt the adults in my life would allow that.

Anyway the prank is nearly ready and Fred is going to be going back in time with me. We'll be doing it before the next quidditch match. Let's hope everything goes according to plan and we don't get caught.

A/N

Picture above of Jack's outfit and gif on the external link of Harry's successful patronus shield.