Childhood
Aya is the youngest daughter of the head of the Kageyama Clan. She has 2 siblings much older than her — Ayase, who was 17 years old when she was born, and Ayane, who was 15 years old when she was born. She is pampered with love by her entire family, including all the clan members. Although they didn't expect a third child, they loved her deeply. Ayase was always spoiling her, letting her get away with anything, while Ayane was extremely happy she wasn't the youngest anymore.
All of that changed drastically after her family was massacred when she was 5 years old. Ayane and Aya end up running to Konoha to find refugee, and they adopt the Nara name as a way to protect themselves. Only a few people outside the Nara compound are aware of who they really are. Ayane joins the ANBU and Aya is taken care of by Yoshino when she is on missions. Before her sister finishes the Academy, Ayane leaves the ANBU.
Adolescence
She joins a team with her sister as the sensei, together with Uchiha Ran and Senju Kei. She goes in different missions before the chunnin exam. During the Gaara first appearance in the village, she ends up bumping into him while she was running towards Naruto, he proceeds to attack her while her back was towards him, when her shadow protects her. Gaara ends up wanting to kill her after that. She does not become a chunnin, but during the preliminary rounds after the forest of the death she is against Uchiha Ran, who she ends up winning against. She is not able to fight in the finals.
During the Sasuke running away arc, she is on a mission with her team, except Ran who was taking care of Sasuke who was in the hospital. When they return to the village, Ayane loses her mind as the only shinobi sent after Sasuke are 12 years olds, and she follows after them. Aya waits with her team and Sakura for Ayane, Naruto, and Shikamaru to come back.
Adulthood
She almost dies during the Pein arc, during the shinobi war arc she is finally using her full power.
After the war, her relationship with Shikamaru and Naruto develops more, and they all get married. They end up having two twin girls.