User blog comment:MyProjectAlicization/Kuroyukihime - Kirito and Asuna's daughter?/@comment-71.190.23.155-20130611030356/@comment-3551173-20130707043122

Well that seems less likely unless Sugu married into money, Asuna had a strict household which made her more likely but Suguha not so much, I'm trying to find the right character that would fit but none comes to mind. Still here is an interesting idea if she were the daughter of Asuna's brother then she could have been taken in by her aunt after being kicked out, otherwise we are dealing with an unknown rich family that hasn't been introduced.