Regulus Black

Although Regulus was secretive, he interacted with Cassiopeia. They had been friends since childhood. Cassiopeia was in Gryffindor, and her inertia sometimes irritated Regulus.
"Black! There's something here! " Cassiopeia ran up to the boy, who was sitting by the lake, leaning against a tree and reading a book. She was practically glowing with joy.
-What's happened?
"The Sorcerer's School is coming to Yahogwarts... and now the big news. There's a winter ball at the school! " the girl exclaimed.
-some kind of noisy and unnecessary event again?
-This is a fantastic event! It will be epic!

• Got it. I'll need to get earplugs so I can't hear your joyful scream.
• Aren't you happy? This is great!
  -Yeah. "Very." The guy lowered his eyes to the book.
  A few days later, a Sorcerer arrived at school. Regulus walked along, listening to whispers of "I heard they have some kind of special uniform," "and I heard they have their own language." Lost in conversation, Regulus didn't notice how he bumped into a girl. She frowned and picked up her bag. She asked him something in her own language, and Regulus realized she was a Sorcerer.
  -What? he asked, in response to her words.
• She rolled her eyes, said something and left.
  He headed toward the great hall. When everyone had gathered, the Sorcerer's students entered. They sat at the table prepared for them. Regulus glanced at Cassiopeia, who approached the guests' table and hugged the girl he had bumped into in the hallway. The girls were remarkably similar. Only their hair color was different: Cassiopeia's was brown, while the student's was blonde. They were talking about something.