PlatypusPatronus

“Harry flung himself out from behind the bush and pulled out his wand.

"EXPECTO PATRONUM!" he yelled.

And out of the end of his wand burst, not a shapeless cloud of mist, but a blinding, dazzling, silver animal. He screwed up his eyes, trying to see what it was. It looked like a horse. It was galloping silently away from him, across the black surface of the lake. He saw it lower its head and charge at the swarming dementors. . . . Now it was galloping around and around the black shapes on the ground, and the dementors were falling back, scattering, retreating into the darkness. . . . They were gone.

The Patronus turned. It was cantering back toward Harry across the still surface of the water. It wasn't a horse. It wasn't a unicorn, either. It was a stag. It was shining brightly as the moon above. . . it was coming back to him. . . .

It stopped on the bank. Its hooves made no mark on the soft ground as it stared at Harry with its large, silver eyes. Slowly, it bowed its antlered head. And Harry realized. . . "Prongs," he whispered.

But as his trembling fingertips stretched toward the creature, it vanished.”
― J.K. Rowling, Harry Potter and the Prisoner of Azkaban

“That Vanishing Cabinet was extremely valuable!”
― J.K. Rowling, Harry Potter and the Chamber of Secrets

“Welcome to the Knight Bus, emergency transport for the stranded witch or wizard. Just stick out your wand hand, step on board, and we can take you anywhere you want to go. My name is Stan Shunpike, and I will be your conductor this eve —”
― J.K. Rowling, Harry Potter and the Prisoner of Azkaban

“You can speak Parseltongue, Harry,” said Dumbledore calmly, “because Lord Voldemort — who is the last remaining descendant of Salazar Slytherin — can speak Parseltongue. Unless I’m much mistaken, he transferred some of his own powers to you the night he gave you that scar. Not something he intended to do, I’m sure. . . .” “Voldemort put a bit of himself in me?” Harry said, thunderstruck. “It certainly seems so.”
― J.K. Rowling, Harry Potter and the Chamber of Secrets