Alexander is presented in the iconic Bandai Robot Spirits style, with a compact, articulated frame built to emulate a towering Knightmare from Code Geass. The figure combines glossy armor plates with matte panels to highlight its layered armor and mechanical detail. The color scheme blends gunmetal gray with dark navy and hints of crimson accents on the chest and shoulder plates. Fine panel lines, rivets, and exposed hydraulics are captured in meticulous sculpting, while the joints are engineered for dynamic posing. The included weapons and accessories—blade, shield, and optional effect parts—allow a variety of combat stances. The head features a visor-like eye slit and crest, and the overall silhouette communicates both power and agility. The figure stands securely on a base stand, with articulated ankles and knees for stable display in dynamic action poses.

Alexander is a Knightmare Frame introduced in Code Geass Gaiden: Boukoku no Akito, representing the next generation of war machines developed by the European factions. In the story, pilots and crews face moral dilemmas amid a protracted conflict for control of territories. Alexander is described as heavily armored, capable of enduring heavy fire while delivering precise strikes against enemy lines. The plot follows the pilot's growth as they struggle with loss and duty, forming bonds with allies who stand against oppression. The frame's distinctive energy sword and defensive shield become symbols of resilience for the squad. Throughout the arc, battles test loyalty, strategic thinking, and the willingness to sacrifice for comrades. The narrative exploration emphasizes the human cost of war, the blurred lines between enemies, and the hope of a resolution that preserves small acts of humanity within a brutal campaign.