Iko Koishikawa is a supporting character from the anime and manga series 'Shy.' She is Teru Momijiyama’s (Shy’s) close childhood friend and classmate. Iko is cheerful, empathetic, and often worries about Teru, providing her with emotional support during difficult times. While she does not possess superpowers herself, Iko’s steadfast loyalty and encouragement play a crucial role in helping Teru overcome her insecurities and grow as a hero. Her presence adds warmth and grounding to the story.