Who am I?

The birds still sing. The world still turns. Am I still here? I was and slave, but now I'm not. Or am I? I should have died instead of her, My dear Nezzy. Locrian will pay, anyone who dares to stand in my way will pay. My sorrow will rise and I will claim victory and plunged Locrian into the hell he specially made for me then I will have my vengeance.