Responses
Hello! Do you mean this one? Havent read it yet but it seems to match your description.
https://www.mangago.zone/read-manga/i_became_the_tyrant_s_servant/
YESSSSS OMGGG THANK YOU SOUR MUCHHH
I forgot the title of this
She possessed the body of the assistant of the emperor, a white hair girl... And she tries so hard not to get killed by the emperor omggggg I'M SO STUPID TO FORGET THE TITLE