onee-nii-sama - Japanese [o-ney-nee-suh-mah] lit. 'big sister-brother'.
A term coined by author Satoru Akahori to address characters that change sex from male to female (and sometimes back again).
Onee-nii-sama in Anime
Mei "Maze" Ikagura (1996-1997) - Maze ~The Mega-Burst Space~
Hazumu Osaragi (2006) - Kasimasi ~Girl Meets Girl~
Fan-Fiction
Snow Princess [9,700 words, unfinished] - based on 'Naruto'. What might have happened if Sakura screams and it distracts Kakashi just at the right moment for him see Haku jump between him and Zabuza? Haku lives, but can he survive in a world with no memories of his past or his true gender?
The Lady Doth Protest [2,600 words] - based on the anime 'Princess Princess'. What happens when the day comes for the cross dressing trio to hang up their skirts, but one of them doesn't want to?
More Coming Soon!