Au scenario where you or your crush has depression during or before the war for reasons you can make up, I decided to make this because it was a thought that had crossed my mind as an idea. 

Polka's Scenario: Polka was sick and tired, people in town have been secretly torturing her with their words of how much of a monster she was, how she would be killed by the serios knights instantly, and she knew that was true, all of it was. She didn't want to be hurt by anyone anymore, so she kept her pain hidden, but that only made things worse as time went by and finally, her mind tells her she's had enough waiting for death, but she only kept waiting to die for five years until she thinks its time for her to go. 

Your Scenario: Make it up.