Mallory Jansen will be portraying her third character in the Framework - Madame Hydra. Picture at the source! It was also announced at the panel that Philinda don't even know each other, thus aren't together, and everyone is Hydra except for Ward - he's part of the Resistance.
And here are pictures of the cast yesterday
Sources 1, 2, 3, 4, 5, 6, 7