[Am I Bothered]

I don't think there is a current regent. In the last couple of months we've seen Hashim, Hamzah, Ali and Faisal act as regent when KA is out of the country.

I think if, God forbid, anything were to happen to KA, then the senior members of the JRF would all meet and nominate a successor. And then when KA's son came of age, then who knows....