back to the Merman Cas AU, I wonder what Oli's role might be in this version of Cas' story, if he's in it to begin with that is. Perhaps he's another merman doing his usual Oli feeder things... Or maybe, he's just the human fisherman that poor Cas met one day and was entirely smitten with... Being brought greasy and fatty foods from the human world to get Cas hooked on, looking forward to each time that whale of a merman floats back up to meet him, bigger and bigger than before...