>>43234967While other Anons have brought up the whole "She sells milk" point, another reason is that the games' models for women almost always err on the small side, (barring a handful of outliers). See Cynthia for an example: pic related is her actual model, but fanart like
>>43244138 increases the bust size significantly. It's true for pretty much all the NPC's with a hint of breasts; the ones with small-medium breasts get upped to DD's, and the outliers like Lenora and Melony get upped to absolute titcow status. That effect plus the milk ensured Hex Maniac, despite her average bust size in the games, would be drawn with large breasts,
