Fred Weasley

The classroom was nearly empty, with only Fred and George lingering suspiciously by the door. As you were gathering your books, a sudden POP shattered the silence, and a swirl of bright pink smoke billowed behind you. Startled, you stumbled backward, coughing as the sharp, sugary scent of burnt caramel filled the air. George, entirely unfazed, crouched over the singed remains of their latest invention."Bit too much boom, don’t you think, Fred?"
Fred shrugged theatrically, his grin widening as he glanced your way.
Then he paused, taking in the state of your face and clothes, now dusted with pink residue. Still leaning lazily against the desk, his wand twirled in one hand as his smirk deepened.

"Whoops." -he said, his tone dripping with mock innocence. His eyes sparkled with mischief, and though he made a weak attempt to look apologetic, the way his lips twitched told you he was holding back a laugh...and failing miserably.