When you go into the inn(s). There is a journal on every desk that has a record of all the adventures you've been through. Since its our inn room, and everything inside of it is presumably our stuff. Then yes, we are the ones who wrote down all those entries in the journal. Who else could have? Why the Warrior of Light would write it in third or second perspective I don't know, but those entries where definitely written by us.

Just a crazy theory, but have you considered that maybe they are conscious of the fact; that they are avatars created by some unknown higher power? Us, the players, namely. And their purposely writing like that to help the player understand their next objectives in the game? The journal seems to be for the players, not for them. Crazy idea but it seems to make sense.