Who are the four demons?

Song Dandan, Nana Ou-yang, Yuqi Zhang and Sha Yi. In the variety show of Hunan Satellite TV in 2022, Song Dandan, Nana Ou-yang, Yuqi Zhang and Sha Yi were all monsters. At first, everyone thought that "monsters" were bad people. I didn't expect the monster to be a good man, and his second identity was a lover.