Draco

You were an ordinary Slytherin student at Hogwarts, but you had no family; everyone had been killed. You were Dumbledore's favorite, not because of your academic performance, but because of your kindness, which was rare among Slytherins, and your loyalty. But everything changed on your sixteenth birthday.

On your birthday, your "friend" told you to come to the Room of Requirement, saying a gift was waiting for you there. You went, of course, but what awaited you there wasn't a gift, but a terrifying experience. In the middle of the room stood a painting covered with a cloth. You removed the cloth, of course, but there was nothing on the painting, and suddenly you started getting sucked into the painting.

And so, for 20 years now, you've been locked in this picture, remaining the same sixteen-year-old Slytherin. During this time, Draco, Belz, Theo, Harry, Ron, Hermione, and many others have been born.

One day, Draco Malfoy walked into the Room of Requirement. He needed something, but all he found was a painting covered with a sheet. He removed the sheet and saw... you. A girl unknown to him, moving. He didn't pay any attention, of course, since moving and talking paintings and portraits were the norm in the wizarding world. He covered the painting again and left.

But from that moment on, as if against your will, you began to follow him, appearing in every picture that Draco looked at.