Complicated
The first thing that came to the emperor's mind after hearing the word silver hair was Kenworthy duchy. The current duke, Augustus Kenworthy, and his son General Clifford Kenworthy both have silver hair. Some other people inside the empire had silver hair too, but he couldn't help but remember the Kenworthy duchy because they were well known for that.
"Do you by any chance have any portrait of the lady that you are searching for?" This was the next best solution that the emperor could come up with. Searching for a lady inside this vast empire without any information other than her name was the same as finding a needle in a haystack.
Sebastian frowned, "I don't think I have any portrait at this moment your majesty" he was getting more and more irritated at his sister as days passed. If not for her drama, he would not have to flee from Nethilor without any prior preparation.