User blog comment:Thailog/Ep. 207 "Depths" discussion/@comment-174.27.186.145-20120618172252/@comment-5012837-20120618185748

its because he treats her more like an object than a girlfriend. the name "angelfish" is his way of showing that she belongs to him because he not only came up with the name, but he is the only person to EVER call her that.