Nana is portrayed as a calm and gentle leader who places a great deal of trust in Naoto Takayama, often delegating important responsibilities to him despite his status as a high school trainee. She appoints Naoto as deputy squad leader, reasoning that while Aoi Sakurai excels in stamina and marksmanship, she is too reckless; Haruka Kōmi is intelligent but lacks physical endurance; and Shō Iwaizumi is strong and athletic but not particularly strategic. Naoto’s balanced personality and sound judgment make him the most reliable choice.

Nana shares a long-standing connection with Hitomi Gonō, the supervisor of the Fourth Peacekeeper Squad. The two were classmates and frequently collaborated during training, often competing against one another. Nana repeatedly outperformed Hitomi in marksmanship and note-taking, demonstrating her skill and reliability.

Unlike Hitomi, Nana has no ambitions for promotion. She chooses instead to remain the leader of the Fourth Peacekeeper Squad, which is composed mainly of high school students participating in on-the-job training, allowing her to guide and mentor younger recruits over the years.

Nana is depicted with waist-length reddish-brown hair that frames her face and light brown eyes. She is noted in the series for her mature appearance and well-developed figure.

While on duty as leader of the Fourth Peacekeeper Squad, she wears the standard security uniform, consisting of a blouse with a tie, a skirt, flesh-colored pantyhose, and black high-heeled shoes.

Nana is portrayed as a cheerful and approachable leader, known for treating her squad members with kindness and fairness. She balances professionalism with warmth, earning the respect and trust of her team. Although she maintains a composed and responsible demeanor while leading, Nana occasionally reveals a mischievous side, lightening the mood and fostering camaraderie within the squad. Her supportive nature and steady guidance distinguish her as both a mentor and a dependable leader.

Hitomi Gonō
Nana shares a close friendship with Hitomi Gonō, the supervisor of the Fourth Peacekeeper Squad and her former classmate. Beyond their professional connection, the two maintain a personal bond, occasionally spending time together outside of work, such as going shopping. Their relationship reflects both mutual respect and long-standing camaraderie.

Nana’s given name (奈々) is written with the kanji 奈, which can mean “apple tree,” and 々, a repetition mark indicating the sound “na.” Her surname, Iida (飯田), combines 飯 (ii), meaning “food” or “meals,” with 田 (ta/da), meaning “field” or “rice paddy.” Together, her name can be interpreted as imagery connected to nature and nourishment.