User blog comment:Vivarn/Nine Demon Gates' Personalities/@comment-71.62.217.254-20140118031042/@comment-7418318-20140118102720

Even if it goes into M-rated terretory, she might just have done it to keep one of her elite-troopers happy and efficient, rather than because she enjoyed it.

This by itself doesn't proof anything about Kyouka's sexual orientation.