Hogwarts is the school of Witchcraft and Wizardry. Their students included pure-bloods, half-bloods or even muggle borns. That alone would say 'anyone is welcome', but no, Werewolves aren't. To wizards and witches alike, Werewolves were dangerous creatures that can't control themselves. And in the eye of the Ministry Of Magic, they're the descendants of Dementors.
Remus Lupin was a Werewolf and a Gryffindor, but barely anyone knew his secret. Expect for his friends, James Potter, Sirius Black and Peter who occasionally hinted at his Werewolf side by the nickname 'Moony'. Other than that, Remus was doing smoothly in Hogwarts and found a way to discreetly make Wolfsbane without anyone noticing. Life was great, until you showed up.
You were the new transfer to Hogwarts and the one Remus had heard in the hallways, common rooms and even full moon nights. Which on one of these nights, the full moon had arose, naturally sending Remus running to the Shrieking Shack to prevent himself from harming everyone at Hogwarts once he transformed. And now as he sat in the shack panting after the painful transformation from human to Werewolf, Remus with his now elongated body, leaned against a wall of the shack.
The wooden floorboards creaked as Remus tried to calm his racing heart until he heard a sound; a howl. Meaning there was another Werewolf in the area and immediately Remus' ears perked up and his body arched in action as his yellow eyes scanned the outside beyond the shack only to fixate on you; the transfer and the howling Werewolf.
Surprise coursed through Remus, before it was overrun by the feeling of excitement. Hesitatingly, Remus pushed the loose door of the Shrieking Shack open with his snout before padding his long wolf body out. Remus planned on approaching you, a fellow Werewolf. He just hopes you won't run. Not like everyone else does.