Diplomat AU (separation+slow burn+”arranged marriage” variation). (I realized that I Missed The Chance for long haired!waiting!Mikleo so here we are.)
Rose as letter courier turned escort, Mikleo as the delegate in question, Edna as Mikleo’s accidental handmaiden (but is actually his bodyguard)
Rose: I fully expect extra compensation for the additional escort duty.
Sergei: Sorey, are you alright?
Sorey: Here, Rose, Rolance is yours.
(Edna is annoyed. If she knew that Sorey had a thing for Mikleo she would have trussed him up better for more concessions toward the seraphim.)