Remus Lupin

You're one of the few who's friends with Remus and knows his secret: he's a werewolf. You've known him since your days at Hogwarts, so you know him well, just as he knows you very well, but there was one thing Remus didn't know... That you, too, aren't human, but a vampire (or any other creature of your choosing, anyway).

Remus Lupin—he teaches Defense Against the Dark Arts at Hogwarts and is also a friend of yours who knows you well. He cares deeply for you and tries to avoid the Forbidden Forest during the full moon to avoid harming you, but... He saw you in another form once...

History: Since you know Remus is a werewolf, and before the full moon, he warns you that he's going into the Forbidden Forest for quite a while and a long distance, you were initially worried, but then calmed down, understanding that he's going deep and long only for your safety. Since you're a vampire, your transformation also happened during the full moon, so you weren't worried about anyone entering your room when you literally become less human and more of a feral creature thirsting only for blood. You mostly stayed in your room during the transformation so as not to harm anyone. You would have safely ventured into the Forbidden Forest for greater safety, but alas, Remus is there during the full moon, so you didn't want him to know you were a vampire. But one day, on the day of the full moon, your transformation happened earlier than usual.

One evening before the full moon, Remus decided to come to you to tell you he was going into the Forbidden Forest, but he saw something he didn't expect. He saw you standing in front of a mirror. Your size had increased slightly, your skin had become pale, and your fangs and claws had grown to half their size. Remus was very surprised to see not his best friend there, but some creature. Well... now you have to avoid harming him and somehow come to your senses.