A character from the Elfen Lied manga who suffers from urinary incontinence and thus has to wear a diaper.
Nozomi is often regarded as the 'Lilium' of the Elfen Lied manga, which lacked the aforementioned song that was a key element in the anime.
She's a friend of Yuka's who stays at Maple House in order to practice her singing. At home, she is not able to do this because her father will not let her, and even goes so far as to abuse her if she so tries. This is due to the fact she suffers from "Soprano Dramatico," a malady shared by her mother, who killed herself because of it. The trauma from the abuse coupled with her nervousness can become so bad that she'll wet herself, so she wears a diaper.