I'm back again! Had this idea a couple of weeks ago and just had the "let's see how it goes idea". This first chapter is more like a prologue I guess, but I thought it'd be a nice touch, and a first attempt at writing about the relationship between the two brothers. Then it'll get onto Sirius' adventures.

I do not own anything that JK Rowling does.

Reviews and advice always appreciated :-)

Sirius' flight

Chapter 1: The Letter

Regulus,

I will be gone by the time you read this, but I felt you deserved to hear me out in some way. I know you probably won't want to speak to me ever again, and when you've finished reading this, even after all the effort I took to write it, you'll likely rip it and throw it in the fire. That is, if you haven't done it already. I will be impressed, but also very relieved if you haven't.
I want you to know that this was not your fault. I just couldn't take it anymore. I couldn't stand this Pure-blood-mania crap and Mum and Dad's abuse, any more than I already have done. Mum and Dad could bruise my whole body if they wanted. They can blow me off the "Family Tree". You can call me a "Filthy Blood-traitor" all you like, because you'd be telling the truth.

I am a Blood-traitor and proud of it too.

I had to leave Reg because, just like Andy, I had to stand up for what I believe is right. I want to play my part in making a Wizarding-world that is peaceful and harmonious between blood races. Everything that the Black family has taught me is wrong. Muggle-borns and Half-bloods are anything but dirty – the only real difference between them and us is that they happen to have less magical heritage than us; and there's nothing wrong with that. They're still people. I left because I want to stand up for and protect my friends; whether Pure-blood, Half-blood, or Muggle-born. I have only seen qualities like they have in two other people before I went to Hogwarts: Andy… and you.
You don't have to be a Gryffindor to be brave Reg. You're loyal, though no Hufflepuff, and incredibly clever, though no Ravenclaw. And you are brave too, I've seen it. Remember when Bella threatened to throw me out of the window when we were little? And you bashed her over the head with one of Dad's books? I was never more grateful that we actually had that book about Dark Magic in the house – you knocked her out cold! And you took the blame too! You would have been an amazing Gryffindor you know. You don't have to be brash and headstrong and impulsive like me. I therefore urge you to be brave again. I know where you and your friends go, and I know exactly what you're doing and who you're with. I haven't been following you, but I haven't needed to. I'm not stupid Reg. I'm not going to say "don't do it", even though my first thought is to do so. But I am going to ask you to think about what you're doing before you get into a hole that you can't get out of. What would you get by fighting with Voldemort apart from ending millions of innocent lives on both sides? I know you won't act all psyco like Bella does around him (it sounds like she wants his baby), but you don't have to be of course to do his dirty work. If you do one thing for me, make sure it's this: really think about it and ask yourself the big questions:
Who are you?
What do you want?
And do you think what you're doing is the right thing?

I'm taking Sophie with me. Ever since I first went to James' house, I have become appalled in the way House Elves are generally treated. Do you like the fact Mum beheads them when they become "useless"? Are you not in the slightest bit angry about what Kreacher did? After only a week here, Mum was threatening to behead her after that twat pulled that stunt? She's practically a child, and I cannot let her suffer here when there is a home that'll at the very least, treat her decently, let alone look after her and even love her.
I will most likely be staying at the Potter's with her if you ever need to find me (though I doubt you will). I will always come to protect you when you need it; there's nothing to be ashamed of in asking for help sometimes.
I never ever wanted this to happen Reg, and I am so sorry for the way I have been treating you. I treated you like you don't exist most of the time; and that was wrong of me. I have been a really shitty brother haven't I? It sounds selfish, but I had to do what I knew was right for me. I know that Mum and Dad will now put all the pressure on you instead of me, but they were going to anyway. You were always the perfect son so I'd be doing them a favour. I ask you though to use that position wisely. Don't let them get to you. You are your own person, so don't be afraid to make your own decisions.
Whatever happens, you will always be my little brother. And I will always love you

Sirius

Regulus Black scrunched up the letter from his so-called brother before ripping it up and throwing it into the fire. Fists clenched, he fell back onto his bed and cried his eyes out; something he hadn't done in a very long time.

'Why Sirius? Why did you leave me?!'