User blog comment:MyProjectAlicization/Kuroyukihime - Kirito and Asuna's daughter?/@comment-6021376-20130415125207/@comment-5592165-20130415143150

He must be tired :D

So her father pass down his "color" to his daughter? May be it is just a coincidence or perhaps it is not. Since there is no present of parents in the series, the author let readers/watchers imagine all they want!