Soldier

Soldiers are lance-wielding infantry units which, for the most part of the Fire Emblem series' history, are unplayable and unpromotable. They usually have abysimal stats compared to other units at the same level, give you less experience than other types of enemies, and stop appearing later in the game. They are a playable class only in Fire Emblem Gaiden and in the Tellius series games. They were an unused playable class. in Fire Emblem: Seisen no Keifu

In Gaiden, they're the first-tier class of the Knight/Baron path.

In Fire Emblem: Path of Radiance and Radiant Dawn, they can promote to Halberdiers once Level 21 has been reached or 10 and above using a Master Seal. They usually have higher Speed and Skill than Knights, but at the cost of lower Strength and Defense.

Gaiden

 * Ruka
 * Fols

Path of Radiance

 * Nephenee - recruited through Chapter 10
 * Devdan

Radiant Dawn

 * Aran - a childhood friend of Laura and a member of the Daein Liberation Army