Miku Nakano, from "The Quintessential Quintuplets", is a shy and introverted middle quintuplet sister with a quiet, passive personality, initially performing best academically but struggling with expressing herself and communicating. 

Appearance:
Miku has medium-length hair, "emotionless" eyes, and often wears a pair of headphones around her neck. 
Personality:
She is initially depicted as a shy and introverted character who struggles to express herself

She is initially bad at cooking