I know that Randall promised Angela that the expedition to Akbadain when they were younger was going to be his last. But I doubt that Angela would mind Hershel teaching Randall how to think like Layton, how he thinks at least and uses his environment like layton. I know they probably just don't want another chance of Randall getting himself killed but with a little tweaking, he could be (almost XD ) as smart as Layton. I was a bit upset when Randall was nowhere to be seen or heard from in Azran Legacies (as far as I know. I've only seen the cutscenes). You'd think that the good Hershel Layton would include his best friend who is of course an Azran enthusiast, in at least some way when looking for any other parts of the Azran. Its not like it is really THAT classified that he can't tell Randall about the Azran girl. I mean do phones not exist there? Maybe with all of Descole's inventing, you'd think he'd invent a phone. I hate how when we find out more of Professor Layton's background, those people, his best friend, his other friends, his girlfriend, etc. they are never heard/seen again :(. I know how important that keeping promises is but there's no reason why Randall couldn't have been involved in the slightest.