Complex sentence: Of those that remain one of the bravest and best is Major Na Gwan-jung, in the air he is cool and level headed, and directly and swiftly dispatches the enemy with a minimum of complication.
Split into simpler sentences: Of those that remain are one of the bravest and best, Major Na Gwan-jung. In the air he is cool and level headed, and directly and swiftly dispatches the enemy with a minimum of complication.