Why is Christan afraid to speak to the lady he loves?
Baron Christian de Neuvillette, a cadet hopeful for a long military career, despite of potential in battle,and his uncanny good looks, was born with an innate inability to make any smart comments. He is not necessarily dumb, as we see in the story that he actually has more intellectual capacity and a capability for tolerance and acceptance that seems to be overlooked in the plot. Yet, Roxanne would have favored a man's charisma, eloquence, and wit over looks, considering that she has never lacked good looks herself.
Hence, poor Baron Neuveville's biggest tragedy is his dull speech, his boring demeanor, and the lack of spark in his conversation which was never smart, interesting and worst of all, was never intelligent.