I think they’re just generally placed in the center white area, meaning they are equally angry, horny, sad and happy. Everyone in the center white is equally part of all four no matter where in the white they were placed.

It wouldn’t be easy to list everyone in the center and say that if their name was slightly to one side or not meant they were more angry, happy, horny or sad. I think that’s why OP just made a huge white area in the center.