A carriage stops by the protagonist's residence, and Olive is told to go to the palace. This is because the King and the about-to-retire General want her to become the next General in the King's army. Olive isn't very convinced at first, but the old General tells her that she can study and prepare under his care. This convinces her to take up the post.
That is wonderful, you must be proud.
Intelligence = 500
Morals = 30
Faith = 400
Sensitivity = 300
Fighting Reputation = 421
Magic Reputation = 370
Social Reputation = 370
Housework Reputation = 370
Highest reputation should be Fighting and must exceed lowest reputation by 50
High intelligence is required for your daughter's success in this ending.
If your daughter's intelligence is high enough (over 500), war will hardly happen with her in charge.
If the daughter's intelligence is somewhere in the middle (300-500), she will quickly learn to adapt to situations which will help her.
If your daughter's intelligence is not high enough (under 300), war will eventually break out. During one campaign she will suffer an arrow injury and be forced to retire from her position. Your daughter will then regret being so foolhardy as the scene fades out.
If moral is higher you may get the Hero ending instead.
Some have managed to get this ending without the required social and housework reputation. The reports mention maxing out decorum and art though while also having talked to the king a few times while combat stats were all over 100. Sensitivity but was slightly below 300.