Nazuna Tennōzu is a 16-year-old student at Maigahara Senior High School. She begins as a second-year student, marked by the red ribbon on her uniform, and becomes a third-year in the story's second season. She plays guitar in the band Irodorimidori.

Physically, she stands as one of the taller band members. She has shoulder-length light pink hair sporting distinctive outward-curling locks on each side of her head. Her signature accessory is a pair of white-framed glasses. She typically wears a pink cardigan over her school uniform, thigh-high socks matching the cardigan's shade, and the red ribbon signifying her academic year.

Her instrument is a unique custom-built guitar she crafted herself at her parents' guitar shop. Named the "Usaguitar" for its rabbit head-shaped body, it features a pink finish with a white faceplate. She uses a pink pick and a white strap with it. This guitar draws from her upbringing, as her father specializes in guitar making and she learned the craft.

Personality-wise, Nazuna appears shy, reserved, and often spaced-out, moving slowly due to either low stamina or her temperament. Beneath this demeanor lies a fiery determination and strong work ethic. She describes herself as a slow learner but emphasizes persistence, stating: "There are times when things get tough, and I don't know what to do... but I'll be okay. My flowers will bloom someday."

Her character development focuses on overcoming self-doubt and finding her voice within the band. Early expressions like "Maybe, just a little bit... I'd like to shine too..." reveal initial hesitance. Later comments reflect growing resilience and commitment to collective effort, such as "If we keep on pushing forward, even just a tiny bit at a time... maybe our message will finally reach someone" and "If we all stick together, and look on ahead, we can keep moving forward one step at a time." This showcases her increasing belief in perseverance and unity.