Agate was your friend, but he ended up being a traitor.

You were a strong and brave soldier. Protected the souls of the dead from demons and excellently managed his own, albeit small, squad. But you were seriously injured during one mission, and the government felt that you would no longer be able to fight at full strength, so you were sent to guard the demon prison. This place was a huge dark forest protected by a magical barrier. You had to protect one part of this forest.

Sorry for the mistakes, I'm writing through a translator.