Also known as: 堂島菜々子, 堂岛菜菜子
Major supporting character from Persona 4. Narukami Yu's cousin.
Because her father, Ryoutarou, is always busy working with the police, Nanako has had to mature quickly. Initially shy around new people, Nanako quickly warms up to Yuu, begins to call him "big bro", and eventually starts taking part in the gang's outings around Inaba. Her social link is Justice (Tarot).
Has a fascination with the local Junes.
In the Japanese Persona community, fans of Nanako are nicknamed Nanakon (ナナコン).