Disclaimer: I do not own Harry Potter or Percy Jackson

A/N: Hello! We've finally got some lessons, with Defence Against the Dark Arts and History of Magic. Also, I've got some music stuck in my head, so from now on, there might be a few references and quotes. Who can find the reference this time!

Anyway, on with the show!

Chapter 5: Basket Case

Harry POV

I did not know what to make of Percy. On the one hand, he was clearly an honest, good guy, albeit a bit too sassy with extremely dangerous cosmic beings. But he was also incredibly powerful, as demonstrated in his entry display. And he was in fourth year classes. I mean, I know it's because Dumbledore wants him to keep an eye one me, but seriously! The dude is too powerful.

We made our way to our first class, Defence with Mad-Eye and the Slytherins. Our demigod associates were muttering among themselves, following us. I don't even know if they knew where they were going.

Hermione strolled up beside me, tugging Ron by the ear. 'Ow!' he was muttering. 'Gerroff me!'

Hermione pointedly ignored him. 'We need to talk about … them,' she whispered.

I frowned. 'What about 'em? They seem like nice people.'

Hermione sighed. 'I know. They didn't have to tell us. But seriously? Demigods? How is this happening?'

Ron snorted. 'Well, Hermione, there are the birds and the b…' Hermione slapped him.

'I think we best not dwell on it,' I said. 'They are definitely powerful, though, so we should best keep an eye on them. I mean, they're here to protect us, right?'

Ron snorted again. 'And has any protection kept you out of trouble?'

I sighed. He was right.

We found some seats in the classrooms, four together at the front (for Hermione was paired up with the equally academic Annabeth), and stopped all conversation about our new guards. Percy and Nico sat themselves in a corner, partially hidden in the corner. Our classmates began to trickle in, filling up the classroom. Idle chatter began to fill the room. Idle nonsense, and a fair share about our, ah, new classmates. As such, what came next was quite a shock.

'CONSTANT VIGILANCE!' a voice called out. Most of the class fell out of their chairs in surprise, and Hermione instinctively raised a book over her head. I jumped to my feet, jarring the desk, whacking Ron in the head, for he had collapsed onto the floor. The most interesting reactions, however, came from the demigods.

Annabeth had whirled around, whipping out a bronze dagger, now pointed towards the source of the voice. Around Nico, shadows swirled, and he vanished, reappearing moments later, staggering against the chalkboard, black blade now in hand. Percy had leapt out of his chair, and magically summoned a sword and shield out of nowhere, and was now standing in a defensive position. He groaned. 'It's you,' he muttered.

Standing in the doorway was Mad-Eye, grinning. 'Vigilant indeed, Mr Jackson. You and I have similar instincts, it seems. Always ready for action, ay?' Malfoy sniggered.

Percy did not humour either with a response. Annabeth sat back down, knife tucked back in her pocket. The shadows enveloped Nico again, and he sat, looking slightly dizzy, back in his original seat. Percy whirled his sword around, and it seemed to collapse into non-existence. He pocketed whatever remained in his hand, and reached under the shield, which collapsed into a wristwatch.

Ron leaned over to Percy. 'You know this guy?'

Percy waved his hand. 'Yeah, he was one of the guys who came to fetch us from America.'

Mad-Eye stumbled to the front of the class, peg leg creating a rhythmic, 'stomp, clomp', until he stood against the chalkboard. He tapped it with his wand, and the words 'CONSTANT VIGILANCE' appeared. 'My job is to prepare you for the dangers of the world. Only ten years ago, the Dark Lord was at large. Many believe him dead. What do I think? Balderdash!'

Several students flinched. They clearly wanted to believe Voldemort was dead.

'Even if HE does not return, others are still a danger. Now, can anyone tell me what the darkest spells are called?'

Hermione's hand shot up. 'The Unforgivables, sir?'

'Absolutely, Miss Granger. The Unforgivables. These curses made up the majority of Voldemort's curses, though he did use some more … mundane curses, as well. Now, can anyone tell me why they are called the Unforgivable Curses?'

Pansy put up her hand. 'Because…'

'Because they are unforgivable!' Mad-Eye interrupted, much to the Slytherins' dismay. 'Using one on another wizard will land you a one way trip to Az-ka-ban!' He wrote the last word down, saying each syllable as he wrote it. 'Wizard Prison!'

Malfoy rolled his eyes. Mad-Eye whipped round, beaning him in the face with the chalk.

'Not everyone knows, Mr Malfoy. And yes, I can see through the back of my head.' There were several sniggers. 'There are three Unforgivables. Name me one!'

Ron put his hand in the air. 'The Imperious Curse?'

'Ah, of course you know that one, Mr Weasley. Gave your father a lot of trouble in the war.' He leant behind the chalkboard, and pulled a spider from a cobweb. He tapped it with his wand, enlarging it. 'The mind control curse! Imperio.' A blue pulse came from the wand, and the spider grew still. 'I can now make this spider do whatever I want.'

He pointed his wand at Malfoy, and the spider leapt at him, causing the boy to stumble backwards. Ron sniggered, and so naturally Moody sent the spider after him. Ron quivered and pale, whimpering. It leapt over to Hermione's desk, resulting in a sharp shriek, and a panicked stumble away from the arachnid. But it wasn't Hermione. It was Annabeth! There was a round of laughter.

'That's funny, isn't it,' Moody said, grinning. 'What shall I have it do now? Throw itself out of the window?' The spider leapt at the window, balancing precariously on the ledge. 'Drown itself?' The spider leapt towards a beaker of water. 'Suffocate a student?' The spider leapt at Goyle, enlarged limbs poking into the petrified boy's mouth. 'You see why this spell is unforgivable, eh?'

He returned the spider to Neville's desk, and allowed the class to settle back down. 'Longbottom!' He barked. 'Give me another.'

Neville grew pale. 'Cr-cr-cruciatus, sir.' he mumbled.

'Yes,' he said quietly. 'The torture curse. Crucio!' A red pulse enveloped the spider, and it began to convulse, letting off strangled squeaks of agony. It was sickening, and Neville began to shake too, face white as a sheet. But the worst thing was Moody. He was grinning. He was enjoying this.

'Stop,' I muttered. 'Stop!' I repeated, louder. 'Can't you see it's bothering him?'

Moody's face snapped up, and a frown settled down. He wrenched his wand away from the spider, which grew still again. 'Sorry, boyo. Now, who can tell me the last one?' When no one answered, knowing what was coming, he repeated his question. 'Or do I need to tell you?'

Surprisingly, it was Nico who answered. 'The Avada Kedavra Curse.' he said, voice cold, emotionless. 'The Killing Curse. Among the foulest of all human acts.'

Moody grinned again. 'And one of the most common spells for Voldemort to use.' He levelled his wand at the spider. Half the class looked away. 'Avada Kedavra!' A pulse of green light. The spider just died, legs shrivelling up. Just like that, dead.

After a long silence, Moody continued. 'There are no known defences to the Avada Kedavra curse. The only survivor is in this very room.' All eyes turned to me. 'The cruciatus can be defended against with the Protean Charm. Imperius can be broken with strength of will. I will be teaching you this year how to go up against the vilest things on this planet. Dementors. Feral Werewolves. Boggarts. But I can only teach for one Unforgivable. Starting next lesson, I have permission to cast the Imperius on students, so that they can learn to beat it. I will see you on Thursday. You are dismissed.'

We looked at each other. Nico's face was blank. Percy's was a grimace. Neville's was pale. We left the class in a sullen silence, broken only by a quip from Percy.

'He's neurotic to the bone, no doubt about that.' At least Nico gave a little smirk at that.

'Ahem, could I have your attention,' Nico called to the next class.

It was History of Magic with the Slytherins, though Binns was absent.

'So, uh, you may have noticed one Cuthbert Binns is absent,' Nico continued. 'Using my, uh, Demigod influence, we have persuaded him to, uh, pass on. Under Dumbledore's orders, of course.' He hastily added the last bit on when Hermione began to frown. 'So, uh, welcome your new teacher, uh, Professor Jackson!'

Annabeth came from Binns' study first, tugging Percy by the ear. 'OW, OW! Leggo, Wise girl!' She did, and he stood there, rubbing his ear. 'I still don't get why you aren't teaching. You're smarter than me.'

'You heard Albus,' she said, sighing. 'I may know a lot, but I get sidetracked, and … 'drone'.'

Percy leaned his head against a wall. 'He's right, I guess.'

Annabeth glared at him.

'Oh yeah!' he yelled, and he jogged down to the front of the class. 'So, I'm only a couple of years older than you, so just call me Percy.'

Nico jogged back to the front. 'Or Peter Johnson. Mr D does.' He ran off chuckling, soon hit in the back of the head with a book thrown by Pet- , sorry, Percy.

'Anyway,' he said, 'I'm gonna be teaching you about mythology and the origins of Wizardkind. So, over the next few weeks, we are going to cover the origins of the universe, the origins of magic, and about some of the most prominent gods that may take insult in the current day to the disrespect of their name. I mean, they don't deserve the respect half the time, but you saw what happens if you insult them last night.' There was a crash of thunder followed by several snorts of laughter. 'Today, we will have a brief look at the Olympians, and the first wizard. Who can name the twelve Olympians? Bonus points for getting their realm correct.'

A girl from Slytherin, Daphne Greengrass, raised her hand. 'So there is the Skyfather, Jupiter, obviously, and then there is Neptune, of the sea. There is Terra, of the Earth, and the twins Apollo and Artemis. The former is an archer and healer, and the second a hunter. That's five. There's, uh, Hades? Of the dead, right. There is Hecate, of course, goddess of magic. Hera, of marriage and families. Titan, of the sun? The dad of Jupiter? That's ten. There is, uh, Venus, of love and beauty. And the last one is Ares, of war, right?'

Percy winced. 'Almost none of that is correct, unfortunately. You kinda mashed Roman and Greek together, tossing in a few random deities as well.' At her affronted look, he hastily added. 'But that is why I am here, teaching you. OK, Wise Girl! Can you run through why that list is wrong?'

Annabeth stood up, huffing. 'Of course I can. So, Jupiter is sort of right, except he is Zeus in Greek. Neptune is the same problem, called Poseidon, Percy's father. Terra is Gaia in Greek, and she is a primordial, not an Olympian. Apollo and Artemis are right, though. Nico, wanna take over.'

Nico stood up, glaring at her. 'So, Hades, my dad, is the god of the dead, and one of the Big Three - Zeus, Poseidon and Hades, the three most powerful gods, excluding the primordials, siring the most powerful demigods. He is not, however, an Olympian, for the other major gods - the Olympians and Hestia - do not welcome him in Olympus. Hecate is not an Olympian either, but she is a minor goddess - sort of like the weaker gods. Hera is correct, Titan is the Roman form of Helios, who is a separate species - the titans.'

At the confused looks, Percy took over. 'The Romans got mixed up. The Titans are the parent species of the Olympians, and most are pretty evil, or have pretty much retired. Helios and Selene are the latter, giving the sun and moon to Apollo and Artemis respectively. Their leader was Kronos, titan of time. We will cover them in more detail later on, don't worry. Annabeth, can you take over?'

'Alright,' she grumbled, though she looked like she was enjoying getting to lecture. 'Venus is Aphrodite in Greek, and Ares is correct. The other gods not mentioned are Dionysus, of wine and madness, Demeter, of agriculture, Athena, my mother the goddess of wisdom and battle, Hermes, god of all those who use the roads including messengers, merchants and thieves, and finally Hephaestus, god of fire and blacksmiths. Hestia, goddess of the hearth, was an Olympian before Dionysus became one.'

'Brilliant. Have you all made notes? There will be a test next lesson.' There were several groans, and Percy smirked. 'OK, second topic. Who can tell me who the first wizard was?'

Draco put his hand up. 'Merlin, obviously.'

'Nuh uh!' He yelled, jumping upon a desk. 'The first wizarding family was that of Daedalus, son of Athena!' There were several doubtful looks. 'Wizards, or originally 'Wise Ones' are simply the blessed people of Athena. The gift is hereditary, and new families get the gift each generation. But the fist was one of the smartest children of Athena ever, the creator of the Labyrinth. It was a replacement for the demigod gifts other demigods have, a more structured form of standard demigod magic.'

Draco scoffed. 'Yeah, right. As IF you guys are really demigods. I bet it's just a cover for why you are really here. Sure, you are powerful, but that was just magic.'

Percy frowned. His whole body tensed, and he leapt off of the desk, somersaulting directly in front of Draco. His blade was now out, leaning over the older boy's shoulder. Around Percy, a spinning column of water began to appear, buffeting the desks. 'Convinced now?' he said, smirking

Draco nodded, but when he thought the older boy was out of earshot, he muttered 'Filthy Half-breeds. Percy spun back round, face contorted into a snarl.

'Do not insult that which your feeble mind cannot fathom,' he sneered, blade hovering by Malfoy's throat. His voice sounded distorted, almost as if a second voice was echoing his words, a voice like a blade scraping against gravel. His words also sounded different, far more formal, but in a derogatory form, as if he thought himself superior. This was not the Percy I had seen. Draco shook, on edge. 'You just might not like the consequences.' He began to lean further in, sword edging closer to Malfoy's throat.

Annabeth and Nico seemed just as surprised, however. Annabeth lunged forward, hand on his shoulder. 'Percy?' she whispered. His face shifted into one of shock, then disgust, then fear. He recoiled from her, and Draco, and slowly backed off. 'Uh,' he stammered. 'You're, uh, free to go.' He stumbled towards the window. He leaned backwards, falling straight down the side of the castle, directly into the lake below. I rushed to the window, relieved to see him bobbing around, conscious.

The class, like the last, left solemnly in silence, leaving a bickering Annabeth and Nico behind.

Once we had got to Gryffindor tower, Hermione pulled us aside. 'That was odd right?'

'Uh huh,' Ron muttered.

'What colour are his eyes?' Hermione asked.

'What?' Ron stared at her.

'Eyes?' she repeated.

'Sea green. I saw at the feast,' I replied.

She frowned. 'That's what I thought, but when he was threatening Draco, they weren't.' She looked up at us with a mournful look. 'His eyes were gold. Pure gold.'

A/N: Ooh! What a mystery :D

I mean, you guys can probably guess what is wrong with Percy, but I think it is a fun idea. Let's see who can guess!

Also, please review, send OCs and give me criticism! It really helps, and improves the story as a whole.

Plus, please check out my HP story, Harry Potter-Malfoy. It's currently at 25K, and has 8K views. It is my first, and most successful story, and will be going on for a long time.

Anyway, see you all next week. By-ye!