Hmmm

I mean it's pretty obvious, why Lydia don't know who he was. She's been quietly living at a secluded palace all by herself avoiding any of the harem or royals. She probably think the emperor is much older and sinister judging from his warmonger reputation and a line up of 30 concubines. Definitely not expecting a hot daddy.（￣へ￣）
It would be nice if the art would retain if it's serialized someday but highly doubt it...