The secret we've just obtained opens before us a completely new set of options, which allow us to train our Gals, augment them, or even change them completely. Trainings are to be found under the 'Soldier Info' tab in the 'HANDS' menu. Once a training is selected, all eligible soldiers at that Hideout will be displayed, along with precise information of what will be achieved and what it will cost. Availability and results may vary a lot depending on individual. Note that sometimes to make a Training available, we will need to possess an appropriate building at that Hideout.