Mino Nenki is one of Iga's strongest fighters. Although lethally proficient with his staff, Nenki's greatest weapon is the control he exercises over his own hair. Draping down his back in a tangled mat, Nenki is able to straighten his hair and manipulate it as a grasping tool. His hair is also strong enough to swing him from tree to tree (leaving his hands free for combat) or even to wrap around an enemy and crush them like a Boa Constrictor. Beneath his robes, his body is covered in coarse fur that can be stiffened into needles to skewer any opponent that gets too close and also provides protection from certain techniques; this the technique he uses to kill Okoi, in example, stabbing her to death when she attacks him after killing Rousai. In the manga, Nenki's hair reflects his moods; writhing wildly whenever he becomes enraged or excited.