People have to remember that Newtypes in U.C. are 1:1,000,000,000. But because we're watching a space opera you're going to be running into Newtypes and Cyber-Newtypes constantly.

When Char sensed Kamille's latent abilities on approach to Green Noa he immediately equated them to an immature Amuro Ray. That speaks volumes about what Char knew Kamille could be, on top of the fact that he stole the Gundam Mk. II on instinct following that undeveloped 6th sense.

Katz by contrast is someone who may have had latent potential too, and while Hayato wasn't sure of it the superstition about Newtypes developing around/on the battlefield might have played a part in the decision to send him to fight with the AEUG.