I'm not described by my blood!

I died an early death, but it was an end that left me with no regrets. I became a 'king', changed the world, made dam sure to eliminate suffering... So how exactly did I end up as Draco Malfoy's twin sister? Well, at least I can get to become king this time...or queen? Magical Queen has a good ring to it. That, and my childhood hero has the same problem I do. She's also female. Eh.