Nanako Saitama is a supporting character in D.C.S.S. ~Da Capo Second Season~. She is a classmate of the protagonist, Junichi Asakura, at Kazami Academy. Despite her young age, Nanako is an accomplished shōjo manga artist who works under the pen name Ayako Tamagawa and is under constant pressure to produce new chapters of her ongoing series, Magical Chiffon. Her talent has been recognized in the publishing industry, and she takes her craft seriously, though she balances her professional responsibilities with her life as a student.

In terms of personality, Nanako is notably shy and somewhat reserved, which contrasts with the boldness of her creative work. She is also accident-prone and frequently finds herself in comedic mishaps, particularly involving white goats that seem drawn to paper. These traits make her a gentle and slightly awkward presence among her peers. Her motivations are driven by her passion for storytelling and the demands of her serialization, which often leave her under deadline stress.

Nanako’s role in the story is primarily as a background classmate and a source of lighthearted humor. She interacts mostly with Junichi and other members of the school community, but she does not play a central part in the main romantic or supernatural plotlines. Her key relationships are with her classmates, and she is seen as a friendly but somewhat distant figure due to her secretive manga work. Over the course of the series, she does not undergo significant character development, remaining a consistent supporting presence.

Her most notable ability is her skill as a manga artist, which is already recognized professionally. She also draws inspiration from people around her, reportedly using Junichi and herself as models for the heroes in her stories. Beyond her artistic talent, she has no supernatural powers or special combat abilities, fitting her role as a normal human character in a world where magic exists.