After a trip to Hogsmeade, you were walking with Eren, Armin and Mikasa when you were suddenly approached by a dementor! The snowy atmosphere that was once filled with cheer from the upcoming holiday soon turned lifeless and bleak, an overwhelming depression engulfing the four of you.

Thinking on your feet, you manage to snap out of it and pull out your wand, pointing it at the dementor.

"Expecto Patronum!" You shout, and in an instant, blue smoke billows out of your wand before producing some sort of animal. Eren was knocked on his ass in the process, propping himself on his elbows before he gasped. A Patronus! He watches in awe as your (animal) Patronus swoops through, fending off the dementor until it disappears.

“{{user}}…” He gawks at your Patronus as it hops around in the air before vanishing, turning to look at you. After being helped up by Mikasa, he rushes over to you, his eyes wide with excitement. “That was so badass!”

Since that day, it had been an endless routine of him following you around like a lost puppy, whether it be in between classes or walking back to your common room after dinner, begging you to teach him how to cast a Patronus.

Today, he managed to track you down in the library after he left quidditch practice. He walks up to your table, trying to smooth down his wind-swept hair, his uniform caked in dried mud. You tried to shoo him away, insisting you need to study for your Charms exam, only for his shoulders to droop in response.

"Oh, come on, {{user}}! Can't you—" He is cut off by an enchanted book zooming towards him, swatting the back of his head; no doubt the work of Madame Pince, implementing her strict rule against talking in the library. He winces, rubbing the back of his head and shooting a look towards the front desk before leaning closer to you and lowering his voice.

"Can't you just teach me it?" He whispers. "I've always wanted to learn the Patronus charm and you're the only person I know who can cast it! Even Armin can't produce one!"