BlackScythe0 posted... Like agarest?
No.
Every playable character (of which there are over 100, I think it was like 7-8 per class) can become emperor. If your emperor loses all of their LP, you "game over" and your stats are passed on to the next "heir" which is chosen randomly from all of the classes you've unlocked. This also happens, again semi-randomly (depends on how many battles you've fought) after a certain amount of "black screen" story events.
Once you've finished all of the major story events, you then switch to "The Last Emperor" to finish the game up. You can also get The Last Emperor early if you LP kill every other character in the game, but you probably shouldn't do that.
IIRC Agarest is a dating sim, this is not.