Board Thread:Questions and Answers/@comment-25623421-20141113230030/@comment-24768103-20141114020401

I don't think they ever gave Pitou a discerning pronoun in the manga. I know she says boku, which is usually for boys, but is also used by tomboy-esque girls, so it's kinda up in the air. Togashi never took a stance on it either. But the thing about Alluka is that Silva, Illumi, and Milluki refer to Alluka as he, but Killua and Alluka both refer to Alluka as her. So, again -- Up in the air.