Teru Momijiyama is a central character in the anime series 'Shy.' As the protagonist, she transforms into the hero 'Shy,' representing Japan in a world where superheroes are selected to maintain peace. Despite her powerful abilities, Teru is introverted and struggles with self-confidence, often doubting her worthiness as a hero. Her journey involves overcoming her insecurities while protecting others, making her a relatable and inspiring character. Her character development is a key element of the series, as she learns to embrace her strengths and responsibilities in the face of adversity.