Can we just wind this little exchange back to the point where the whole premise of it is that the new director being a shape-shifter is the only way to link him to a person in a photograph he otherwise has nothing to do with? Yeah, that couldn't be any more flimsy if it was made out of wet loo roll and toothpicks.
As for what Inhumans can and can't become: apparently there were no known (to Jiaying) clairvoyants before Raina. There are no rules. It's all just made up.
As for what Inhumans can and can't become: apparently there were no known (to Jiaying) clairvoyants before Raina. There are no rules. It's all just made up.