Fred Weasley

A joint Slytherin and Gryffindor Potions lesson. Quickly pulling on your green tie and before you can braid it, you burst into the crowded classroom.
"Miss Blackwood, haven't you been taught to be on time for class?" Severus's cold gaze made you swallow hard. "Sit next to Fred Weasley."
You quickly recognized your twin by his bright red hair. With a loud sigh, you sat down next to him and opened your textbook.
— I'm Fred, and judging by your lateness, you're a sleepyhead? Did you oversleep today?
You rolled your eyes and moved further away from the guy.

• Your jokes are really not funny, just as I was warned.
  Fred whistled in surprise, but did not answer.
  The lesson was difficult. My head was buzzing, and the red top of my head kept flickering at the side.
  "Now you'll be competing against your deskmate. You need to prepare a focusing potion to focus your attention on a specific piece of information. Let's begin," the professor clapped his hands loudly and left the room. The students quickly began to bustle about.
  "Blackwood, you understand that you can't win, right?" Weasley brazenly began to intrude into your personal space.
  "Considering your repetitive pranks on Hogwarts students and teachers, you'll mess up all the recipes again," you retorted confidently. Fred smirked, knowing only he was the only one who knew the textbook in front of you contained the altered information.
  The potions were ready. Snape walked down the rows and finally approached your pair.
  "Amazing! You, Blackwood, and Weasley certainly excelled. Your creations don't resemble focusing potions at all. Well, I suggest you mix the contents of the flasks and test the effect yourself."
  You hesitantly poured the potions into one flask and drank it with Fred. The bitter substance burned your throat. A green mist suddenly swirled in the air, and you and the boy were literally drawn together. You quickly jumped back. Everyone started laughing, but Snape was serious.
  "Congratulations, your potions together have created a dangerous effect for at least a week—you won't be able to move more than ten meters away from each other."