"Watashi" isn't female, it's neutral.
"Atashi" is female. And "Watashi" is also more formal than either "boku" or "atashi", which is probably why Sebastian uses it.
http://tvtropes.org/pmwiki/pmwiki.php/UsefulNotes/JapanesePronouns?from=Main.JapanesePronouns
Also I found this site, and there was one sentence I'm still cracking up on:
>>If a male character uses atashi it is almost certainly meant to imply that he's Camp Gay.<<
I can't. I just can't. :'D Please someone tell me it's true!
Ah, so thats why! Thank you! ^^
Can someone please explain to me, why Sebastian use "watashi wa" the female pronoun instead of "boku wa" the male pronoun, when he says "he's just one hell of a butler"? (Source from anime)
And is he using the female pronoun in the manga too or is it just in the anime? Sady I can't read japanese kanji, and I really like to know.
Anyone here who knows this?