The Squad is based out of Plantation 13, living within their home area, Mistilteinn (ミストルティン, Misutorutin), colloquially referred to as the Birdcage.
As the Franxx for the squad leader, it is armed with two sword type weapons named "Envy Shop."
It is covered with heavy armor and is loaded with a fist bayonet type artillery named "Rook Sparrow," which can cause great damage at close distances.
Nines is a special and defense force directly subordinate to APE and Zero Two's former unit, which originally appeared as a result of attempts to create functional pairs from her DNA.
In this regard, all members of the squad have an underlined androgynous appearance and fundamentally avoid any gender roles in their behavior.