If the father is such an absolutely amazing genius, how come Akira was kidnapped so easily and he & princess had to save themselves and defeat the evil cult on their own? The old man being such a legendary figure came out of the blue and has played zero role in the earlier chapters. But then again, maybe he's just similar to Akira and would rather appear to be a nobody, hiding his real power, to the point of allowing his child to die. Though even Akira didn't go that far, as he ended up revealing his power to the princess.