|“||I...I've made up my mind. I'm going to live my life!||”|
–Nozomi, standing up to her father in Another Happy Future
Nozomi is a friend of Yuka's, who met her in high school where Yuka served as Senpai to the nervous Nozomi's Kohai. While possessing a beautiful singing voice, her family, most especially her father, forbid her from using it to pursue a career. Her father's efforts even reach abusive extremes. Both Nozomi and her mother possess the Dramatic Soprano (called "Soprano Dramatico" in-series) voice type, which is said to be uncommon for Japanese people. Nozomi's mother committed suicide after her voice was ruined, presumably by her oversinging and putting constant stress on her vocal chords. Nozomi's father sought to stop her interest in opera, thus keeping her from suffering the same fate as her mother, through this abuse, which was often physical in the form of severe spanking.
The childhood trauma from her father's abuse leads to her wetting herself whenever she became too nervous and therefore wearing a diaper for her overactive bladder, even up to the time she was invited by a now college-age Yuka to practice at Maple House. This offer, in turn, leads to several awkward encounters with Kouta, whom she develops a secret crush on, and Nyu, who gropes and nearly sexually assaults her (along with everyone else she gropes). Kouta discourages her from thinking herself a coward, even calling it an insult to his friend, being herself, and to him by extension. The 'family' of Maple House delighted in her singing, bringing her joy as well, and slowly increasing her confidence.
Liking the people and atmosphere of Maple House, Nozomi often chose to stay there instead of at her father's home. Presumably, it is the knowledge that Nozomi is staying with her responsible Senpai that allows her controlling father to permit this. It is Nozomi who teaches Nyu how to sing the song Elfenlied. Sometime after the events involving Mariko, Nozomi moved into Maple House on a full-time basis, at last, having reconciled her father to the dream she refused to give up.
Nozomi is among those injured during the invasion of Maple House by forces seeking to recapture Lucy. A soldier forcefully seizes her by the throat when she expresses concern for Yuka. The rest of the series makes unclear whether or not this permanently affected her singing voice. During the climactic events of the series, she openly defies her father's wishes to remain in her sick bed and instead rushes to be by the side of Kouta, and their friends as Luy/Nyu is dying. It is possible that this new strength of character is more important than fully regaining her voice. However, it is not unreasonable to speculate that she regained this as well. In fact, in the final chapter, she was able to talk with Yuka, proving her throat healed and her voice returned. Given her closeness to Yuka and the others, it seems likely that she was close to any children her friends later had.
- Nozomi is also a seamstress, at least once repairing Nana's tattered clothes.
- Nozomi's family life, including standing up to her father, is the subject of a bonus manga chapter at the end of Volume Eight.
- The producers excluded Nozomi from the anime altogether. This exclusion was said to be a point of contention between Director Mamoru Kanbe and series creator Lynn Okamoto, though the details differ as to who asked for what in this circumstance. Her role as the teacher of the song that touches Lucy's hardened heart appears to have been passed on to the music box that Kouta purchases as a boy in the anime adaptation.
- When Nozomi first appears, it is her family's desire she takes over the family business that is the basis for their opposition to her dream. Later on, only her father is opposed, and for very different reasons.
- Nozomi appears by herself on six manga chapter covers.
- The dramatic soprano voice type Nozomi and her mother possess notable for being powerful enough to sing over an entire orchestra. In operas, a dramatic soprano will often play long-suffering tragic heroines, as is certainly the case for Nozomi's mother and, though she is implied to pursue her dream, in the end, Nozomi herself.