Tuesday 4:50pm

Dear Diary,

I suppose I should start my introducing myself. Actually, that would be stupid; I'm the only one who's going to read this – unless my brother finds it of course. Oh well, I'm going to do it anyway, because I don't really know what else to start with. My name is Julia Diane Potter. I am fifteen years old and going into my fifth year at Hogwarts School of Witchcraft and Wizardry, where my brother also goes, but a year above me. His name is James and quite frankly, he's a pain in the arse.

I mean neck.

Must remember not to swear. I made a bet with Sirius that I could go the whole holiday without doing it.

Actually, thinking about it, maybe it's not such a good idea to start a diary while Sirius is staying with us. I just won't write anything too personal. Yeah, that's what I'll do.

Sirius Black: James's best friend. He ran away from home last week, so Mum and Dad are letting him stay with us. It doesn't really make much difference; he's here most of the time in the holidays anyway. I suppose this time is different for him though, since he can't go back. I don't think he wants to go back anyway and I don't blame him. He doesn't talk about it in front of people but I've heard quite enough about the Black family to determine why he'd want to leave. When he arrived on the doorstep last Thursday he said "My Mother blasted me off the tapestry!" I'm not completely sure what tapestry it was but he seemed happy about it. I wonder how he feels about leaving his brother. They don't really interact at school except sometimes when there's a tense kind of standoff, but James said they used to get on. James also said that Sirius told him Regulus had joined the dark side. I don't know if that means he's become a proper Death Eater, but it seems likely considering the company he keeps. Ugh, it makes my skin crawl just thinking about them. Avery, Mulciber, even Snape, Lily Evans' best friend. Well, until he called her a mudblood a couple of months ago anyway. James told me exactly what happened of course – he tells me every single tiny thing to do with Lily Evans since he's completely in love with her. Too bad she hates him. I know I said he's a pain, but he's not so bad when it comes down to it, quite a good brother actually. I suppose he is quite a prat around her though. I see him around school, ruffling his hair and have to strongly resist the urge to wallop him and tell him to get a grip.

Sometimes I honestly don't get how James and Sirius have so many girls fawning over them (my friends included). If they could only see them in private sometimes…

Like Saturday for example. Uncle Paul was coming over and bringing our three and five year old cousins, so Mum had cooked these little cakes for them. Sirius and James came down as soon as they smelled baking of course. "They make my hand look massive don't they?" Sirius said, and then walked around pretending to be a giant and James shoved one in each of his cheeks. Idiots. Mum had better bake some more cakes for when Remus and Peter come next week. Not for Remus so much, although he does sometimes look like he needs feeding up, but Peter would eat a whole tray of those in about two bites probably.

That was mean of me.

I don't really like Peter that much though. It's so awkward if I'm ever left alone with him. I tried to talk to him a few times but all he wanted to know was where James was or when he was coming back. I gave up after a while.

Dad asked if I wanted any of my friends over during the holidays. Ha! With my brother and Sirius here? No chance. It's bad enough when we're at school, but imagine if they were actually in my house, with James and Sirius' bedrooms across the landing! I'll settle for owling them, thank you very much.

Anyway, I'm being called down to tea now so maybe I'll write in here later. Or maybe tomorrow. Or when something interesting enough happens to write about.

9:20pm

Dear diary,

Sirius found my diary. He said it was boring and made me pay him a galleon for writing arse, so the bet's over. He also told me off for calling him an idiot and asked which of my friends fancied him. I told him Deborah, Katie and Louise. He asked if any of those was the tall one with brown hair. I said "No," and he said "Then carry on keeping them away from me."

He didn't show any of it to James because he said he'd keep going on about me calling him "not so bad" and "a good brother" and it would get irritating. Then he said, "I'm going to tell Remus you're going to feed him up so the house elves can cook him for Christmas dinner." I wish he wouldn't snoop through my stuff.

Anyway, I dug out my Mokeskin pouch so now he won't be able to get it again, which means I can write whatever I want about anyone! I could even write that I do want to eat Remus Lupin for Christmas dinner if I were so inclined.

I don't though.

AN: This is something I did for a bit of fun, since I hadn't written anything in so long, and I wanted to see if I could write differently to how I normally do, so I decided to try a diary format. Obviously I'm not JK Rowling. I already have a few chapters written of this, so the first updates will be quite frequent, but after then probably not since I'm doing loads of exams and coursework in the next few months. But I hope you enjoyed it :)