/jp/ - Otaku Culture

For anyone who's read Sayonara wo Oshiete, what was the significance of Nozomi (the literary girl, for those who can't remember)?

Given that she was a brain, perhaps the protagonist came across her strolling through the hospital? If so, what did she even represent? The rest of the girls' roles were fairly obvious, eg. Koyori and her arrows symbolizing the protagonist's inability to accept himself and then there's the whole thing with his childhood goals, but I can't pin down Nozomi.