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Dear fanfic author,
It is impossible for a character to "literally" have a "river of exposition", unless in that universe, emotion has a physical presence, takes a liquid form, and makes a river. You don't have to hang a lampshade on everything. Half the characters are in a strange dimension, of course they'll need an explanation.
TVTropes has a lot to answer for.
-J
TVTropes has a lot to answer for.
-J