During preparations for battle, Yuki always has a few paper airplanes folded from memory alloy foil ready on him.
This is his master's prized skill. The shape of the paper airplane considers both "radar electromagnetic wave reflection" and "aerodynamics," and inside, there's a small metal tuning fork, no matter if the opponent's supplemental senses are electromagnetic radar or ultrasonic radar, it will have a certain impact.
They will only perceive an object the size of a human rushing at them from behind.
Naturally, the Martial Artist will instinctively evade or counterattack.
Even with just such an intention, making the wrong move allows the person throwing the paper airplane to gain the upper hand.