The Great Hall, Hogwarts

Piper

Piper and her friends all went to the Great Hall. They found some seats at the far end of the Gryffindor Table, where less people might overhear their talking. "Do you guys have any suspicions yet?" Percy asked. Everybody shook their head in a resounding no. Piper personally wasn't sure. She was keeping her eyes on someone, but she didn't want to make any false accusations.

Annabeth studied Piper's kaleidoscopic eyes. Her brows knitted with worry. Piper motioned that she was fine. However, she wasn't sure if she was fine or not. Jason patted her shoulder. Piper liked the feel of his hand, and leaned into him.

Leo

Leo wasn't paying attention. He was too busy fixing his machine. If it worked, it could remotely control his Archimedes Spheres, allowing them to be spies. He planned on attaching spheres in classrooms, hallways, bathrooms and even the four common rooms. He knew how to get them inside. The drainage system.

The Defense Against Dark Arts Classroom, Hogwarts

Harry

Harry was looking forward to this subject. He was the best at it. He could already produce a Patronus. He smirked at the thought of that. Of course everyone in the DA could also, but that was because he was such a good mentor.

In the classroom, Harry and Ron sat next to Seamus, Dean, Annabeth and Percy. Harry tried to get a clear view on Percy's inner arm, but Seamus was blocking his sight. Professor Lupin arrived.

"Hello and welcome everyone, my name is Professor Lupin," He said with a resounding grin. "This year, we will be focusing on charms, jinxes, curses and hexes. Can anyone tell me the differences?" To nobody's surprise, Hermione's hand was up first, Jason and Annabeth following for a close second. Lupin called on Hermione.

"Charms are usually helpful, jinxes are usually minor dark charms with irritating effects, curses are the most violent, and hexes deals moderate damage that can involve changing the physical body." She said in a know-it-all voice.

"Correct, ten points to Gryffindor. Now, I am going to show you the Bubble-Head Charm." Professor Lupin gave a pause, winking at Percy, Jason and Thalia who grinned back. "Now, cast your wand between your eyes, and say Aquafini Bubblisia!" The class repeated in chorus. "Very good. Practice." Harry was anxious to try it out.

"Aquafini Buubblissa!" He blundered. A chunk of ice attached itself to his eyes. Harry could hear the roar of laughter and his ears turned red. When he cleared the ice away, he was shocked to see Percy, Jason and Thalia all with bubbles around their heads, their friends gazing at them amusingly. Harry was angry. I'm supposed to be better! He thought furiously. "Aqufina Bubbblesda!" He shouted. Instantly, he started spewing green liquid out of his eyes, ears, mouth and nose. Ron jumped back in horror. Professor Lupin walked over, and shouted.

"Everyone, quiet! Scourigify!" Instantly, Harry felt much better.

"Er, thanks." Harry said sheepishly.

"I think you should go up to the Hospital Wing, Harry. You're still bleeding slightly." Professor Lupin advised. Harry quickly hurried out of the room.

Percy

Defense Against Dark Arts was a piece of cake. Percy used water to form a thin veil of water while Thalia and Jason sharpened the air around them into a bubble. They were bored, so Percy and Jason decided to have a bubble-head fight. Jason won, only because he changed his bubble into a sharp drill and poked Percy hard on the nose. They all ended up laughing about it.

Herbology Greenhouse 4, Hogwarts

Jason

Jason, Percy and the others all returned to the common room briefly before going out to the greenhouses. Professor Sprout greeted them, and directed them to Greenhouse 4. They all excitedly entered. Percy whispered something to Leo. Leo nodded. They both grinned evily. Jason wasn't sure what that was about, but he knew he would watch them closely. Today, they were supposed to plant Jiggleweed. These green weed that grew near rivers do not like to be touched, and will attempt to crawl inside a person's sleeve when given the chance. Percy dropped one inside Jason's sleeve, causing him to jerk and well, jiggle being tickled by a plant. Jason satisfied himself by dropping two inside Percy's robes, causing him to glare at Jason momentarily before falling on the floor, laughing unwillingly.

When they were returning to the castle, Jason saw Leo sneak a couple of the weeds inside his pocket, but Professor Sprout was there in an instant, shaking her finger disapprovingly before reaching out and grabbing the plants, her iron grip on them so tight they couldn't possibly break free.

P.S: The books didn't mention how to cast the Bubble-Head Charm, so I made my incantation up. As always, thank you for reading.