zaku-zaku（ザクザク）
1. A crunchy, cutting, or digging sound
pika-n（ピカーン）
pika-n describes a sudden flash of light or a sharp moment of realization.
gacha（ガチャ）
1. A mechanical clacking or turning sound
bari-bari（バリバリ）
bari-bari describes a hard, tearing or ripping sound, such as paper or material being forcefully torn.
pyon-pyon（ピョンピョン）
1. A light, bouncing or hopping movement
shuwa-shuwa（シュワシュワ）
shuwa-shuwa describes a light, fizzy sound or sensation produced by bubbles, carbonation, or gentle effervescence.
piko-piko（ピコピコ）
piko-piko describes a small, light, repetitive movement or sound, often associated with simple electronic beeps, toy-like motions, or rhythmic mechanical reactions.