Nana

Nana, most commonly referred to as Nana-senpai (NANA先輩), is former member of the club Japanese Culture Festival Research Society who was a senior of Linda.

Appearance
As a rock band vocalist, Nana is seen wearing punk clothing and is normally seen with an electric guitar which carries on her back. When she is relaxed or not wearing punk clothing, she also has an element such as a rock band shirt. She is mostly seen wearing heavy amounts of make-up which include dark grey eye shadow, dark burgundy lipstick and black nails.

Personality
At first, Nana seems to have a cold and rough personality but later on, it is shown that she has a good and kind-hearted side to her personality shown when trying to help Linda who was her Junior. She also shows kindness through her numerous run-ins with Banri Tada such as the time he has a fever and she took him to the hospital.

She also dislikes it when she seems peoples who are in doubt.

History
Nana was once a member of the Japanese Culture Club Festival Research Society. It is said she later left the club because she was busy with her band.

Plot
Nana became aware of Linda and Banri Tada's unresolved issues with each other.

Nana found Linda one day crying over her and Banri's relationship and it was that point where Nana became aware of the relationship between Banri and Linda. She helps Linda by tricking Banri into thinking there's a leak in his apartment complex that might've affected his room. Once Banri rushes to his apartment, he realizes that Nana was the one that made the call about the leak and she was tricking him into meeting with Linda as he was avoiding her.

Banri learns that Nana was actually his next door neighbor and also that she was a senior and good friend of Linda's and they became closer throughout the series. Banri would sometimes bump into Nana, asking her for advice and for help. And later in the series, Banri became sick and Nana takes him to the hospital. She reveals to him that she really does care about others more than herself and she hates herself for not doing more.

Trivia

 * It is obvious that the character is inspired by Nana Osaki, one of the protagonists of the romance manga NANA, the other being Nana Komatsu.
 * These similarities include: appearance, rude yet kind personality and being a rock band vocalist called for a band called BLAST (an abbreviation of Nana Osaki's band, Black Stones). However, it has never been confirmed by the author of either Golden Time or NANA that the two are the same person.