Naoka Ueno is a supporting character in the Koe no Katachi series. She was Shōya Ishida's classmate and friend back in elementary school, until she denied any part in helping him bully Shōko Nishimiya. When she meets Shōya and Shōko again in high school, old feelings of infatuation and resentment begin to resurface. Naoka is a pale-skinned teenage girl with straight, mid-back length black hair with long bangs, along with having dark purple eyes. She is normally seen in her school uniform: a traditional white and red sailor fuku uniform, along with a dark skirt and a tan school sweater. Naoka is also shown in her part-time job uniform, in which she wears glasses and ties up her hair as well as her bangs, making her unrecognizable to Shōya and Tomohiro. Naoka is rather blunt about her negative feelings towards people she dislikes, especially with Shōko Nishimiya. Where she struggles is in her ability to showcase her more positive qualities, such as her soft and caring side, often resorting to rather rude and insensitive approaches to certain interactions. While it can be argued that her ability to confront her own negative feelings is respectable when used rationally, Naoka's tendency for rash actions and anger causes her to lash out in several instances. In particular, during Chapter 44 when she assaults Shōko, who is still recovering after attempting to take her own life. Naoka has some degree of self-awareness when it comes to her own flaws and actions, even showing remorse at certain points and expressing a desire to be different, though she is hesitant to believe that kind of change is possible. It’s this belief that people can’t change who they really are that Naoka tends to project onto several characters during the series, particularly Shōko and Shōya, who challenge her belief with their actions. Ultimately, Naoka does begin to show hints of progress towards the end of the series, seen through changes in her behavior towards several people and even during a conversation with Shōya where she is hesitant to come to like Shōko despite her trying to do so.