The X-3 is meant for long range attacks and bombardments. With a gravity defying fusion engine, she can hovers in mid-air and act as a carrier unit to carry both the X-1 and X-2 to scenes of battles. Due to her sizes upon attached to an armed module unit, her close melee combat skills are greatly compromised and so she isn't so suit for close combats unless detached from the module.
Armed with mega beam cannon for long range, lasers for middle/close range and homing missiles for bombardments, she is capable of mass destruction on enemy territories and bases. For efficiency, the X-3 is normally paired with the X-2 to provide long range supports while the rest moving up to penetrate the enemy lines with the X-3 takes the air while X-2 takes the ground. She can also use variety of hand-wield arsenals.