I'm Grell Sutcliffe, a now-female shinigami. I love yaoi ships and Sebastian and Will and the Undertaker. :) Feel free to ask me any questions.
Yana Toboso’s Black Butler Artbook Vol. 1 / Madam Red & Grell Sutcliff
Grelle Sutcliff is a canon, outed transgendered woman! She specifically states that she wants a sex change (she even specifically says this is what she wants most), and prefers female speech/pronouns!
Grelle is a trans woman in the Victorian era, a time where psychically transitioning was unheard of and not possible at all. Now is the twenty first century and times have changed. Let’s all RESPECT HER PRONOUNS, SHALL WE?
Proof in her confessional (by Yana Toboso) above.