Montag

—Jagen to Marth before the start of a chapter.
Montag is a playable character from the 12th installment in the Fire Emblem series, New Mystery of the Emblem. They are a recruit willing to join Marth's army, and can only be acquired if the player does not have enough units to fill the maximum amount of deployment slots before a map.

In Game
Montag is a "Generic Unit," or a unit without a unique portrait, and is a rare example of such a unit being playable. Another example of this concept would be in the 13th chapter of Thracia 776 where the player is put in charge of three generic Lance Knights and two generic Arch Knights, alongside their commander, Glade. Coincidentally, Montag is the 13th unit of this nature that joins Marth's army, with the similar units preceding Montag being Eins, Zwei, Drei, Vier, Funf, Sechs, Sieben, Acht, Neun, Zehn, Elf, and Zwolf. Montag's class starts and their gender are completely random, and will always join with either an Iron weapon which depends on their class, or a Heal staff if they are a Curate or Cleric. Their level and weapon ranks vary depending on the chapter that the player is on, and their base stats depend on their class. Their growth rates are the exact same as their base class.

Etymology
Montag means "Monday" in German.