A/N: To everyone who's read this far: bless your face. If you want to bother reading this, sorry I haven't put any author's notes in before now; this is my first time and I'm learning. You've all been there, right? You're all nice people, right? Please don't hurt me – eep!

For any of you who feel Katrina is a MS, please tell me; there are a few events where she proves her non-MS-yness, but I don't want her to be perfect.

This chapter is a little dull, but I want to stick to the storyline; if you skip this chapter I won't blame you… BUT KEEP READING!

Disclaimer: I don't own Harry Potter or his world. If I did, Lupin, Tonks, Sirius and Fred would all be alive and well.

The Philosopher's Stone

"GRYFFINDOR!"

"We got Potter! We got Potter!"

Katrina shook her head at the twins' outburst, clearly heard above the general din.

Harry Potter, the boy who lived, sat down grinning a few seats away from the three. He was soon joined by Ronald Weasley, Fred and George's younger brother. She had met Ron, along with most of the other Weasleys, on Platform 9 and 3 Quarters a year ago.

The year seemed to pass quicker than others. Harry replaced Charlie as Gryffindor's Seeker, and Oliver became the new captain. Fred and George changed their names to Gred and Forge - much to everyone's amusement, including hers. They lost the Quidditch Cup, but won the House Cup, and Quirrell turned out to be harboring Voldemort on the back of his head. At the end of the year, George and Katrina were waiting for Fred to finish packing in the Common Room.

George turned to her, a funny look on his face. "I just realized something. Remember the Christmas holidays, when the three of us bewitched those snowballs to follow Quirrell around?"

"Yeah. What about them?"

"None of us ever thought that we were throwing snowballs straight in the Dark Lord's face!"

Katrina, who had realized what George was saying half-way through his last sentence, collapsed into giggles, soon followed by George himself.

When Fred came down the stairs, he was met by a strange sight: his two best friends practically rolling on the floor, laughing so hard they were crying.

"What did I miss?"

The Chamber of Secrets

De-gnomeing the garden was harder than it sounded.

Katrina pulled another gnome from the garden and tossed it over the fence. A thin sheen of sweat coated her forehead. Fred and George worked alongside her. She was staying with them over the summer break.

"Percy got twelve bloody O.W.L.S," grumbled George. "Mum'll be expecting us to get as many come exams."

"Next year!" Katrina threw a handful of dirt at him. "Don't get me started thinking about them!"

"Yeah, otherwise you'll be studying all year round and we'll never get a moment's peace," Fred teased. "You're like an older Hermione Granger!"

"Did you hear about Harry and Ron's entrance yesterday?" asked Katrina, looking up from the morning edition of the Daily Prophet. They sat in the Great Hall, amid the din of hundreds of students.

"Of course we heard about it; he's our brother!"

"Yeah, our younger brother too." Fred's disgruntled face made her smile.

"I blame you two."

"What? Why?"

"You're the ones who had the idea to rescue Harry via flying car. If you hadn't had the idea originally, they never would have thought of it." Katrina was always a little grumpy in the morning.

"Oi!" Ron looked up from his seat in between Hermione and Harry further down the table, cross, a mouthful of bread hanging out of his mouth. "We 'ould too 'ave thought of it!"

George ignored his younger brother. "We should have been the ones to pull off something like that."

"Where would that put me?"

"Give me a sec... yep, you'd be along for the ride." Fred grinned down at his eggs.

"Forced by you two criminal masterminds, obviously." Fred and George had already made a name for themselves as genius pranksters, and her being their best friend, she had quite a reputation too. Somehow she just managed to get caught up in whatever joke they were currently planning.

"Kidnapped, more like."

"And we have a new Defense Against the Dark Arts teacher; this Lockhart bloke." Katrina changed the subject quickly.

"Whadya think, Kat? New crush?"

"You wish. He has more hair gel than brains."

Both of the twins gave her funny looks. "Hair gel?"

She smiled patiently. "Never mind."