A lot of things are being reordered, so please bear with us. These are Merle's archives. She's always been one of the more introspective and doubtful among us, to the point where it's probably not healthy for her. She worries that she doesn't belong, but it's only because she insists on over-thinking everything. I don't think that she's capable of feeling like she belongs anywhere, and that is what makes her one of us, more than anything else.
This introspection leads her to write down the meaning of things. To be a guide. In a way, I think she is guiding herself. The most doubtful are the most driven to understand, and they are the ones among us who articulate and elucidate best of all.