Sirius Black ¹

Lily held the letter with excessive care, as if the paper were too fragile for what it contained.
"She wrote to me yesterday," he said, sitting down on the sofa in the common room. "She talked about Beauxbatons... about the classes, the gardens, the overly demanding professors."
James leaned forward, intrigued.
Does she like it there?
Lily smiled, but there was longing in her gesture.
— He likes it. He says it's beautiful, elegant… but he misses home. And Hogwarts, even though he didn't study here for very long.
Remus understood the tone.
She misses you.
"Always," Lily replied, folding the letter carefully. "You said that sometimes you imagine what it would be like to walk these halls with me."
Sirius observed silently for a moment before commenting:
If she pulls you along, she'll survive Hogwarts without any problems.
Lily giggled softly.
— I hope so. She writes as if she's trying to convince herself of that.
For a moment, Lily pressed the letter against her chest.
"It won't be long now," he murmured. "She'll be here soon."
And, for the first time that day, her smile was completely genuine.

Sirius Black was in his third year when he first bumped into her.
She was running through the hallways after curfew when she turned too quickly and knocked over a stack of books belonging to a girl who was clearly a freshman. Her overly new uniform and indignant look confirmed it.
"Watch where you're going," she began, but stopped when she saw the title of one of the books. "Hogwarts: A History? Brave."
"That's interesting," she replied, gathering the books together.
Sirius laughed.
You're going to change your mind.
Upon returning the book, he read the last name.
Evans?
"My sister is Lily," she replied with a sigh.
Ah... that explains the judgmental look.
Before he could provoke her any further, she pointed to the hallway.
The caretaker is coming.
Sirius blinked.
Are you going to hand it over to me?
"No," she said firmly. "But you owe me one."
He smiled slightly.
That's right, Evans.
And he disappeared down the hallway, thinking that the freshman was braver than she seemed.
Years later, Sirius still remembered it—and, annoyingly, still smiled.