The guard released his grip on his gun, feeling that it wasn't worth it to keep it. Instead, he drew for a knife hidden just beneath the cloth over his armor. With what appeared to be near superhuman speed, the guard ran towards Batman, ready to slice him through with it.

Hakkyoukushiki indeed struck at the guard's head, toppling him, but it did not knock him out. Instead, he aimed his gun at Kallen midway into the fall and fired a shot. Before landing, he quickly caught himself with one hand and picked him up before letting his guard down even more. The last two others that were near the guard that had been hit continued their march towards the intruders.

Normal means don't seem effective against these knights.