Akari Kuzehashi is the home economics teacher and homeroom instructor for class 2-A. Her first appearance is a brief cameo in the first season's final episode, with her role expanding in the second season and later media. She presents a formal professional image, consistently wearing a business suit and styling her brown hair in a side ponytail secured by a pink scrunchy. Unintentional scowling or glaring frequently lends her an intimidating demeanor.

Despite this stern exterior, she harbors a gentle disposition and a strong affection for cute objects. This contrast repeatedly hinders her attempts to bond with students, as her expressions inadvertently unsettle or frighten them. She demonstrates unwavering dedication to teaching duties, consistently prioritizing professionalism over personal inclinations.

Her professional relationships evolve across the series. Initial clashes with Karen Kujō arise from their opposing personalities, but shared struggles with facial expressions foster mutual understanding. Karen actively assists Akari in smiling naturally and bridging their divide. While enforcing academic standards like homework completion, Akari consciously tempers her sternness toward Karen. Among colleagues, she maintains a notable connection with Sakura Karasuma, often seeking advice while admiring Sakura's effortless rapport with students.

Background details include participation in track and field during her school years and current ownership of a pet cat. Youko Inokuma addresses her as "Kusshi-chan." Her name carries specific meanings: "Akari" combines the characters for vermilion red (朱) and village (里), while "Kuzehashi" incorporates long time (久), world (世), and bridge (橋).

Character development unfolds primarily through student interactions, especially with Karen. Though inherently kind-hearted, Akari's initial approachability issues stem from expressions that alarm students. Karen's persistent efforts gradually help Akari soften her sternness. By later story points, her presence no longer automatically intimidates students, reflecting improved expression of her genuine self.

In the film "Thank You!!," she retains her established role in a relatively minor capacity compared to central student characters. Her journey culminates in heightened awareness of her impact on students and deliberate adjustments to her conduct, while preserving professional dedication.