One of the characters first introduced in Princelings and the Lost City has preternatural hearing. I’ve called it x-ray hearing as I needed an X! He can hear ordinary conversations nearby, but he can also hear things at a distance, through different levels in a castle. It is not clear whether he can tune this or whether it is only for things that affect him directly, but it gives him suitable warning that it is time to leave. Exactly why he has this talent is to be explored in a later book.
Fred and Lupin both share the ability to ‘ask’ for something in a castle and for it to arrive, or be presented to them. This is one of the more common talents among princes and seems to indicate that they are natural successors to the title of King. It doesn’t always occur in people who achieve the rank of king. Sometimes it skips a generation, sometimes it goes down a different path completely. Lupin and Nimrod both share it, which is one reason why Lupin is interested to know whether Kira can do it too. I apologise to anyone thinking this bears too much similarity to the Room of Requirement, but Hogwarts was not the first castle to answer its inhabitants’ needs. I think the reason for my prince’s talent will become clearer as time goes on.
I think it unlikely that unusual talents only occur in those of royal blood. Or maybe it shows that everyone has royal blood in them somewhere. But George does not have this particular talent of the castle responding to his needs. George has other talents entirely.