Fifth Spear, Sargain (五の槍・サーガイン Go no Yari Sāgain) is the leader of the Mechanic Corps and master swordsman, he's actually a karakuri-robot body built from Jakanja alloy and piloted by a small robotic ant. Out of all the seven dark spears, he is the most loyal to Tau Zant, and is the third most powerful spear overall in the series.