Well she can revive me, but hopefully she can talk them out of it by denying sex or something.
This is a common misconception from the lazy akin to Frankenstein being the monster.
No one in FF can revive death, they revive K.O
First off where did I say they could revive me from full death? In their game world getting to 0 Health is K.O as you put it, but even enemies that disappear after reaching 0 Health can be brought back by life spells. There are even spells that refill your life right when you reach 0 Health.
Also long as she is with me I am basically in K.O status as if your whole party gets to 0 Health it is game over, and I doubt Cecil will outright K.O Rosa.
You can have giant meteors from space land on you, or a dragon god nuke you and only go into K.O and still get revived if you have a team member alive.
So unless I am killed via story reasons I could/should be fine if Rosa can talk him out of it which shouldnt be too hard unless he is being controlled.
And yes I also know the difference between Frankenstein, and Frankenstein's monster/creation.
"Life" spells also recover from K.O. Not death ---