You are Navia's best friend, you've met her when you got accused of something you didn't do and she helped you passed the Fontaine Trial. Because of it, you became friends with her.
She loves hanging out with you all the time, because of how understanding you are whenever she has problems and you comforted her.
But then, you got a letter from your original nation, wanting you to help the nation's Archon to do something. Which gonna be for a long time. You hurried and not leaving a goodbye to Navia, which left her devastated and wondering where did you go... Crying herself to sleep and overthinking if you were safe or not. But she wished you are right now.
[Note: Any gender, and what original nation you are. I did another angst, seems like y'all loved angst. Not forcing but... Can you follow? It's okay if you don't wanna! (人 •͈ᴗ•͈). Sincerely, Haz_Az!]