|Kanji Name||七咲 逢|
|Romaji Name||Nanasaki Ai|
|Age||16 (Amagami SS), 17 (Amagami SS+ plus)|
|Date of Birth||February 21|
|Manga Debut||Chapter 1|
|Anime Debut||Episode 1|
Ai Nanasaki (七咲 逢, Nanasaki Ai) is one of the main female protagonists of the story, and the main protagonist of the 4th arc. A student of class 1-A, she is a classmate of Miya Tachibana and Sae Nakata, and is also an aspiring member of the official Girls' Swimming Team. She is revealed to have become the President of the Swimming Team in the first episode of her arc on Amagami SS+.
She has short black hair and purple dusky eyes. She wears the school's uniform, and is the only known girl to use a blue sweater instead of the regular beige one that most girls use. Being part of the swimming team, she is mostly seen wearing a swimsuit, which she sometimes wears under her uniform.
She tends to be cold and reserved, hanging most of the time with Miya Tachibana and Sae Nakata. When she meets Miya's brother, Junichi, however, she soon falls for him despite having a low opinion of him at the beginning. She possesses a cool and calm disposition. She has fans in school as well. She also acts her age, but sometimes she acts the opposite.
She has a younger brother called Ikuo.
She is a member of Kibitou Girl's Swimming Team, which is why she is wearing her swimsuit most of the time. Apparently she admires her captain, Hibiki Tsukahara.
Junichi meets her at the park while on his way to the Park Public Toilet in the evening, accompanied with Umehara. They accidentally peek underneath her skirt as she jumps from the swing. Ai notices, labels them as perverts and jokingly teases them by saying she will call the police.
The next day, Junichi meets Ai again during lunch with Ai yelling at him due to him taking too long for choosing a lunch set. In the afternoon, during her swim training, she goes out to find a black cat she named Pooh and meets Junichi again. This time, she teases him after she realizes that Junichi is trying to peek underneath her skirt again, revealing to him a swimsuit worn underneath her skirt. She tells him that what he saw underneath her skirt during their first encounter was also her swimsuit. Before departing, she reveals to Junichi that she is Miya's classmate and warns him that she doesn't want her best friend to have a pervy big brother.
Ai meets Junichi again on the next day inside the school library with her studying to get a better grade, while Junichi, Umehara, and Kaoru try to get a look at the new librarian girl. She is soon being taught by Junichi in Math due to Kaoru's and Umehara's suggestion which impresses Ai and changes her view about Junichi.
As the series goes on, her relationship with Junichi becomes closer, which can be seen when they go shopping together. Junichi teaches her about an Inago Mask toy, talks about taking care of Ai's little brother, have fun at a park, and her feelings can be revealed during her depression after being unable to join the swimming competition.
On Christmas day, Junichi helps Ai with taking care of the Swimming club's Oden stall. After the party, she takes Junichi to her secret onsen and they take a bath together. The arc ends with Junichi sleeping on her lap and Ai spoils him on the side of the beach.
She feels down for not having a swimming club activity. Junichi decides to cheer her by talking in the place where he and Ai have met before for searching Pooh. In the end of the OVA, Ai is hugged by Junichi by holding on her skirt pockets, which makes her shy and Ai tells him that she needs to hurry and do her shopping. Junichi agrees to come along with her.
Takes place a year after the Amagami SS Ai Nanasaki arc. In the beginning, she is seen with Junichi on the beach, spoiling each other. In the next day, Junichi decides to take a look for her in her club time. However, soon Junichi is scolded by the girls which is worsened because of Miya join the fray (though at first he was scolded by Ai herself and planned to be forgiven). At night she is thinking about where she should have her next Christmas date, as she can't take Junichi along with her to her family's private onsen because of the deer's population problem.
However, the next day, Junichi apologizes to Ai because he failed the cram's school exam due to his clumsiness for answering the questions wrong for a slide (and he even said the answers are supposed to have a good mark). At first, Ai forgives him and just let it by due there will be a remedial exam. But her hope is downed because at midnight, Junichi is forced to go for supplementary lessons which is revealed by Miya (Junichi told Miya to deliver the message of his sudden urgent).
In the Christmas Eve, she walks around and reminds herself about her time with Junichi when he was together with her, which makes her cry as she misses him. Soon, Junichi comes to her while she is looking at the Inago Mask's belt toys. They have their times afterwards until they accidentally meet with Maya Takahashi (though they don't realize that she is halted by Umehara for some moment).
In the end of this arc, Ai wakes Junichi to watch fireworks. This end might be a year after the SS+ is finished because Junichi stays in an apartment for his college activities.
Taking time after her date with Junichi when he was escaping from cram school study. She nurses Junichi because he has a fever. In the end of it, Ai is influenced by Junichi's fever due of his fault for hugging Ai while he was still and Junichi takes turn to treat her this time.
In her route, she is portrayed as a girl who places swimming above everything. She sees Junichi as a bit childish for his age, possibly in part because he reminds her of her own little brother.
Her relationship with Junichi strains her swimming performance and puts her at risk of not being qualified for the tournament. They work things out and Ai manages to stay in the swim team. After the festival, they spend their Christmas in a hot spring in the mountains. Junichi realizes how much she means to him and confesses. She accepts and hugs him while they are both in the spring. Many years later, they are seen again watching fireworks from their room.
Ai and Junichi spend Christmas at the school festival. He confesses to her on the rooftop and she accepts. They watch the lighting of the Christmas tree together.
Many years later, they're both working in different companies. Ai is late meeting Junichi at a ramen stand because her boss chewed her out for not being married at her age. Junichi mumbles something about marriage while Ai smiles and asks him what he just said again.
If Junichi stood her up on Christmas, Ai is hurt and doesn't talk to him for a while, but eventually forgives him anyway. Many years later, they're talking to each other on a beach with his head on her lap. She realizes that she can never stop loving Junichi.
Amagami SS+ plus
- Ai is the only girl to be cold on Junichi on her first sight, except on Rihoko's and Tsukasa's arc.
- She has a habit of wearing a swimsuit under her school uniform.
- In anime, her ending is mixed between best ending and bad ending. She and Junichi spend Christmas in a hot spring in the mountains, but in the last scene before credits she and Junichi are shown at the beach, talking while Junichi rests his head on Ai's lap.
- Ai shares some similarities with Mai Sakura from Amagami's spiritual successor, as both Ai and Mai are athletic. Ai is a member, later captain of the swimming team while Mai is a member of the Gymnastics team.
- Ai is rarely seen with Miya or Sae once she become Junichi's girlfriend.