Malfoys older sister

Platform 9 ¾ and the train ride

~Platform 9 ¾~

As the Hogwarts Express Bleats its horn, we crane over the milling horde of students. Parents hurry their children onboard, tiny siblings wave goodbyes... and Mrs. Weasley dashes through the throng and up to an open train window. 

Mrs. Weasely: "Ron!" 

 She hands Scabbers through the open window to him.

~Train Car~

The aisle teems with students. Harry, Y/n, Ron, and Hermione work their way down the aisle, looking for an empty compartment. 

Harry: "I didn't mean to blow her up. I just... (troubled by the memory) ... lost control." 

Y/n: "It's fine, remember what I did." 

Ron: "Brilliant!" 

Hermione: "Honestly, Ron, it's not funny. Harry's lucky he wasn't expelled." R

on: "I still think it was brilliant." 

Y/n: "He wasn't going to be expelled. I made everyone in Great Brittan two hours late." 

Ron: "That was you?!" 

Y/n: "I was six!" SNAP! SNAP! SNAP! A copy of The Monster Book of Monsters scuttles crab-like down the aisle, pursued by Neville Longbottom. 

Neville: "Hi,Harry. Ron. Hermione." 

Y/n grabs the book and calms it down. 

Y/n: "Here." 

Neville: "Thank you." 

Y/n: "Y/n." 

Harry/Hermione/Ron: "Hi, Neville." 

As he bumps past, Hermione nods to a compartment. 

Hermione: "C'mon. We're in here." 

Harry: "Sit with us?" 

Y/n: "Gladly."

~A random Train Compartment~

Tom: "Where's Y/n?" 

Draco: "I don't care." 

Blaise: "Who's Y/n?" 

Pansy: "Yeah?" 

Draco: "No one important." 

Tom: "That's my future wife." 

Draco: "She's not going to fall in love with you." 

Tom: "You don't know that."

~Back with Y/n~

As they slip inside, they find a man in shabby robes slumped against the window, asleep. 

Regulus: "Shout mooney." 

Y/n: "Why the hell would I call him Profesoor Mooney?" 

He looks ill, exhausted. The trio eyes him warily. Whisper. 

Ron: "Who d'you reckon he is?"

 Y/n: "Hey, Lupin." 

Hermione: "Professor R.J. Lupin." 

Y/n: "Remus Lupin. I've ran into him a few times." 

Ron: "You know everything. How is it she knows everything?" 

Hermione: "It's on his case." 

She points. Stamped in peeling letters on a battered case is "Professor R.J. Lupin."