When the Black Eagle Strike Force begin Capturing Derdriu, Claude calls upon Almyran forces led by Nader to help defend the capital from Edelgard's forces. After being defeated he apologizes to Claude for having to retreat. After the battle he leads an attack on Fódlan's Locket, requiring Edelgard to help defend the fortress in Holst's absence. After being defeated by her forces again he remarks that not only is she the first person to defeat him in battle, but to do so twice.
In the Verdant Wind route, Nader is introduced as Nardel, a retainer to Claude and House Riegan, but is quickly revealed to actually be Nader the Undefeated, a renowned general of Almyra who was "undefeated in a hundred battles". Despite this formidable reputation, however, Judith notes that Nader went undefeated so long because he ran away from potential battles before they could start. When Claude was a child, Nader served as his training instructor.
|Magic||Combat Arts||Abilities||Starting Items|
Axe Prowess Lv 3
*Dropped upon defeat.
Nader may be based on the Arabic nadir meaning "extraordinary", "rare", "exceptional", or the German Näder, an occupational name for an "embroiderer" or "tailor".