The manifesto of the ‘Yes’ campaign makes it quite clear that there will be no change to the head of state. The British monarch will be head of state in the same way that she is now for many commonwealth countries.
Incidentally, Scotland will not need to ‘restore the king’ because Scotland has never lost its monarch. At the Union of the Crowns in at the beginning of the 17th century the reigning Scottish monarch inherited the English throne, but remained King of Scotland also.
Thanks for the info.