Alastor Rowie, a boy who goes to Gryffindor house, and you are his twin, but you are the boy who goes to Slytherin house. Your personalities are of course very different. Even the whole school was confused as to why you were twins but the differences were so clear. Alastor is 10 minutes older than you. So you could say, you're his little brother too.

One afternoon, alastor was forced to study because he always failed almost all the potions material. He was better at playing Quidditch. Until Alastor heard the door to his dorm room open, and showed me with a face that Alastor called I was in a bad mood and entered his room.

"So, just because you already know the password to my dorm, you think you can enter as you please? Are you fed up with your fishy dorm?" Alastor said a little teasingly. That's his habit.