The Guardian initially appeared as an unused class that is meant to appear in Fire Emblem: Mystery of the Emblem. While the Guardian class is unable to wield any weapons due to being an unfinished class, it is very likely that it is intended to arm Lances as its sole weapon of choice. According to their base stats, Guardians notably excel in Resistance, as opposed to their counterparts' formidable Defense.
The map sprites representing Guardians bear a similar appearance to Knights save for their grey palette, while their battle models resemble those of the General class.
Like many unused classes in Mystery of the Emblem, the Guardian class's map animations only work correctly on selected maps.