Budgies, once they got to adult age, are not much for being petted.
The fact that you have a pair that have one another to bond with and Hades has allowed you to pet him is a great step forward and you shouldn't dismiss this. Persephone is telling you that she does not want you to touch her and you should respect what she is telling you by continuing as you are- not touching her.
If I were you, and you want to get a stronger bond with them, I would continue to work with Hades and just work on getting your female to accept you talking to her and being close to her and the cage without her reacting with a bite.
Work on getting Hades to step up if that's what you are wanting to achieve next and she may become curious when she sees what he is doing.
None of my budgies are tame but Skye became quite curious about me when he was first here and would sit on my laptop. once he was with the other budgies and flew over to the laptop, the others all followed.
Budgies are nosey. Just keep positive and concentrate on where you are getting a good response.