There was a lot of demand to release Kai as female, supposedly. Watch at your own discretion.
http://www.inven.co.kr/board/powerbbs.php?come_idx=2471&category=%B0%D4%C0%D3%C1%A6%BA%B8&p=1&l=3016&vtype=pc
http://www.inven.co.kr/board/powerbbs.php?come_idx=2471&category=%B0%D4%C0%D3%C1%A6%BA%B8&p=1&l=3016&vtype=pc