Mukku's characters have no consistency and keeps having amnesia like her.
The reminder that Ra is the powerful Aj is mostly from dialogues.. He speaks of them during the 'romance on Icing' and then Ro mentions his powers. And when he was shown curing Shikhu and Ro. But I wonder why did Ro and Shikhu need special attention from RaAj?
To me the scene felt more like Mukku was reminding us that 'see I remember Ra is the vanshaj!'
Forget about powers, just give Ra's character intelligence and diligence, that should be good enough coz then even without the so called inherited powers he would not throw away things of magic so carelessly, he would have taken away the power source of Pi's magic, her locket.