Board Thread:Questions and Answers/@comment-16544958-20131218132129/@comment-3480156-20140204164012

I've been wondering the same thing, so I did some maths: in chapter 85, Koubun says that became Kougyoku's servant eight years ago, and at that point Koutoku had just recently come to power. Now it seems based on the most recent character profiles that roughly two years have passed between the first and second Sindria arcs, so actually, Kouen claiming in chapter 208 that Hakuyuu and Hakuren died ten years ago would be correct. Therefore, had they lived, Hakuyuu would currently be between 30 and 32 years old, and Hakuren between 27 and 29 years old.

Hope that helps~