Major Nexx Gilbert is an elite variable fighter pilot in the United Nations Spacy and the reigning champion Valkyrie pilot in the Solar System. His top-tier status within Earth’s society fosters a degree of narcissism, a trait amplified by the celebrity treatment accorded to elite pilots.

He flies a combat-ready prototype of the advanced VA-1SS Metal Siren variable fighter during a critical fleet battle against the Marduk forces near the Moon. Subsequently, he assumes command of one of the two Macross Cannon ships deployed to counter the final Marduk attack on Earth, with personnel from the Faerie Squadron serving as his bridge crew.

His connection with fellow ace Silvie Gena forms a notable part of his personal history. The two have dated on several occasions, though their relationship remains largely undeveloped beyond that point. Despite this, he holds genuine romantic feelings for her. This personal dynamic coexists with his professional respect for Silvie’s exceptional piloting abilities, which rank just below his own. Another Faerie Squadron member, Saori, is openly interested in him and regularly attempts to cultivate a closer connection.