Sergius is the handsome fiancé of Raina, a romantic like she is, attempting to act the part of a knight in modern warfare. He makes a fool of himself at the Battle of Slivnitza by leading a cavalry charge into a line of cannons, but fortunately they did not have the right ammunition, and he won the day. Because everyone laughed, and he did not get promoted, he quits the military in a self-righteous huff. He tires of playing the ideal love with Raina, and begins flirting with Louka, to whom he is attracted. He claims he is five or six different personalities and does not care if he is consistent.