Alignment Whistle

The Focus Shot of Kutaka Niwatari from the Spirit River Railroad (a Touhou LW original). She sends a message via whistling. The special baby chick on her head, Piyo (real name unknown), is said to have taught her this effective whistling method. According to one theory, the bullets fired in a battle of bullets are waves. Since sound waves are also waves, you can use instruments to produce bullets, and by nullifying the waves, you can defend yourself from bullets. That might sound like a leap in logic, but if you look at ripples, you'll surely realize their beauty is similar to that of bullets. However, it seems this attack has been made visible in a different sense.