The Paladin is a horse mounted unit who use swords and spears for their weapons. Upgraded from the Social Knight, the Paladin works in the exact same way as their lower class. These units rely on their superior movement abilities to support their allies rather than attack head on. Because they have no real statistic strengths, Paladins and Social Knights are often used to aid characters from a distance, quickly block a wave of approaching enemies or (when applicable in the later Fire Emblems) use the rescue command on an injured or slow ally to bring them into/out of the battle.
See Social Knight
Paladins are the promoted versions of Social Knights and can not be advanced any further.