I'm not saying Ephraim is right, but that doesn't really matter. I had Ike and Oscar talking about how to fight bird laguz before I even got to the ship.
Celice is a rebel. Notice how his favourite FE game is Gaiden, how he hates Ocarina of Time, and how he prefers the Japanese versions of names for FE, even though the English ones (for the English speaking world, anyway) are superior (usually).