If they are bonded (and it seems to me they are because, if they were not, she would bite him) and the female is sweet to you, you not only have the 'new and possibly dangerous human' problem but also the 'he is trying to steal my female from me'. All senegals are extremely jealous and possessive birds as well as fearless, and males can be VERY aggressive! I rescue birds and take in all kinds of aggressive ones from macaws to GCCs (I don't count little ones like tiels, budgies, etc as aggressive) and the most aggressive one I've ever had is a male Senegal. He was worse than an ex-breeder, wild-caught male amazon and that, my dear, is saying A LOT!.
I suggest you let him be for now, don't try to interact with him physically, don't ask him to step up or anything, just talk, sing, whistle, keep him company and offer treats. Restrict your interaction with the female to another room where he cannot see you. Keep him to a solar schedule and feed them cooked whole grains mixed with vegetables, a piece of fruit and a leafy green (it will take a long time for them to eat the greens but they eventually will) for breakfast and seeds/nuts for dinner. This way, you can let them out first only one hour and later two hours before sunset and, when the sun is halfway down to the horizon, turn off the artificial lights and put their seed/nut dinner in their cage and just wait for them to go into it to eat it. If you feed them seeds from the morning and leave them in their cage all day long, this won't work and neither will the training. Establish strict routines and schedules (it makes them feel safe and gives them a sense of control over their own lives thereby reducing stress significantly). Once you see that he is beginning to calm down (observe and learn his body language) start target training. Only two sessions of 5 or 10 minutes at the beginning and no more than three of 15 once they get used to it. Do not insist if the birds don't want to do what you want them to do. Ask twice and, if the birds don't do it, walk away and do something else and come back and ask again in another hour or so. You need to go very slowly because you need to win him over and that takes time. Do not wear gloves, just keep your hands where he cannot bite them and move them slowly. If you need to put something in a spot where he is perching, try to distract him by moving something in the opposite side and put it there real quick.
I agree with both Wolf and Liz, that breeder has no business keeping birds much less breeding them. He might say he loves them but, in reality, he doesn't. People who love birds do not abuse them or try to break their spirit the way this evil man did. His putting the birds under water is going to have consequences for the rest of these poor things lives (they will be afraid of it and will, most likely, panic when you try to bathe them so don't even try to do it).





