pyon-pyon（ピョンピョン）
1. A light, bouncing or hopping movement
niko-niko（ニコニコ）
niko-niko describes a state of smiling cheerfully and continuously.
moko-moko（モコモコ）
moko-moko describes something that appears soft, fluffy, and thickly padded.
gera-gera（ゲラゲラ）
gera-gera describes loud, unrestrained laughter marked by a sharp, open sound.
waku-waku（ワクワク）
waku-waku describes a bright, eager feeling of excited anticipation.
sara-sara（サラサラ）
sara-sara describes a smooth, light, and free-flowing quality in texture or movement.
pusu-pusu（プスプス）
pusu-pusu describes a faint, weak sound of air, heat, or energy escaping, often associated with smoldering, leaking, or something gradually losing strength.
doki-doki（ドキドキ）
doki-doki describes the rapid beating of the heart caused by excitement, nervousness, or anticipation.
shittori（シットリ）
shittori describes a state of gentle moistness or soft richness, often used for textures, atmospheres, or emotional impressions that feel calm, smooth, and quietly refined.
shito-shito（シトシト）
shito-shito describes light, quiet, and continuous rainfall.