Here is the full list of all 31 Queen At Arms achievements.
Romance Archmagus Rubus.
Romance Prelate Lucius.
Learn the truth of King Kendrick's legacy.
Romance Head Archer Cesca.
Use fire magic to aid a wounded soldier.
Claim the throne as ruler of Orthera.
Hesitate to claim your crown.
Romance Mechanist James. (Thanks for naming this one, Fiogan!)
Complete Chapter 4 after siding with Alastor.
Spend years in prison, then get crowned.
Mysteriously killed by bandits after a high-profile confrontation.
Romance Spymaster Fox.
Romance Prince Alastor.
Someone avoids a death sentence.
Wait too long to attack.
Take heavy losses at the Battle of Arendy. (Your King is disappointed...)
Romance Knight Lorimette.
Complete Chapter 4 after siding with Queen Charlotte.
Gain the throne after a trial and execution.
Complete Chapter 3.
Minimize your losses at the Battle of Arendy. (Your King is impressed!)
Shrapnel bombs are a great idea... right?
Ask Rubus to set the forest on fire, you pyromaniac.
Complete Chapter 2.
Volunteer to lead the charge across the river.
Complete Chapter 1.
Accidentally kill a group of Ortheran soldiers.
Run away with Nick.
Save Prince Alastor from wolves.
You died!
Get slapped.