I'd like to point out that these people are national heroes and stars, guys. As a result, there's going to be biographies published on them if they haven't written an autobiography themselves. Them not wanting to talk about their past is one thing, but that information would be out there for anyone who actually went looking for it, so it doesn't make any sense to just skip it in that field on the profile.
Likewise with personality, even if it's just a brief overview, people are going to have a rough idea how they act. Pick any famous musician of the modern era, do about 10 seconds of research and you can find some basic personality traits, even if it's just 'reclusive'.
Don't take the easy way to skip out on this, guys. Its not our characters that are reading the profiles, it's the players. If we know more about the other characters, we'll have an easier time putting them in positions where they all get a chance to shine.