Place it right after the teasing line or compliment that causes the reaction, then follow with a baby laugh to soften the moment or an oh my god reaction to heighten the surprise for the next beat.
关于此声音
This is a brief, high-pitched kya from Miku Nakano of The Quintessential Quintuplets, lasting under two seconds. The sudden, soft squeal feels shy, startled and sweetly flustered, especially because she is normally reserved and quiet. It comes from the Japanese manga series, which began in 2017 and became a television anime in 2019.