Akiko is Nayuki Minase's mother and Yuichi Aizawa's aunt whose main role is in Nayuki's arc. 

Akiko is a kind and caring person. She is a great cook and is proud of her special and unique jam, which no one likes. It's unknown if she has tasted it or if she likes it. She tends to answer yes and no very quickly, usually in one second. She works at an unspecified job and takes care of the house, cooking various types of food, most of which is good except for her infamous "special" homemade jam which she alone enjoys the taste of. She appears to not realize exactly what is going on around her, taking in strays such as Makoto Sawatari and assuming lame excuses for her behavior. Akiko is known to be very easygoing and is constantly smiling. She will not even resort to stern lectures, such as when Makoto spends money on herself that Akiko gave her to buy food. Akiko can be assertive, though she never has once raised her voice in anger or otherwise. She will often give responses to questions within one second of being asked, the answer almost always marking approval.

(Source: Kanon Wiki)

As a young child, Aizawa Yuuichi had often visited his cousin in the city. However, something drastic happened to keep him away for seven long years. Now, Yuuichi returns, his memories of those days are simply gone. 
Settling into the wintry town, Yuuichi comes across several young girls, all of whom are connected to his past. As he befriends them and continues to interact with them, the long forgotten memories from his childhood begin to resurface...

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**Non-anime roles:**
Shunya - Monochrome Mobius: Rights and Wrongs Forgotten

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Laughs and shenanigans are on the horizon in this crossover! Fan-favorite characters from Kanon, Air, Clannad, Little Busters!, Rewrite, and more start the school year together in a new world where anything is possible. With so much personality in one anime universe, every day feels like a new kind of dream. 
(Source: Funimation)

Changing schools is something Yuuchi is accustomed to, due to his parent's profession, and with their recent venture to Africa, he is returning to his aunt's home after 7 years. The time that has passed since his last visit has faded his memories of the people he knew, and the ties that bonded them to him, including his cousin Nayuki. Slowly those people, coincidently all being girls, find their way back to him. However, time has passed and things have happened in their own lives that sets the tone for the series. Secrets that are coming to surface, and memories that are returning to not only Yuuichi, but to those surrounding him. A very heartwarming tale that touches upon a spectrum of emotions, mystery, and the supernatural.
 
(Source: Anime News Network)

The spring has come since Yuuichi reunited with Ayu, and lives of all major characters are back on track. When Mishio visits Makoto's birthplace, however, a miracle happens before her eyes. 
(Source: Anime News Network)

Kanon is the story of Yuuichi Aizawa and his return to his always snowy hometown after eight years. The problem is that Yuuichi doesn&rsquo;t remember his time there and all the people he met, so he has to gradually begin to remember everything. Of course this being a love story Yuuichi meets several girls including his cousin Naiyuki, the taiyaki obsessed Ayu, the silent Mai, the cute yet aggresive Makoto, and the terminally ill Shiori. 

The second manga, under the main title Kanon was adapted from the visual novel version that preceded it, and was illustrated by Kensha Shimotsuki. The first bound volume was released in Japan on April 1, 2007 and focused on Nayuki's story. There are four chapters in volume two, one for each of the other heroines not featuring in volume one, starting with Makoto's thirty-eight-page chapter, followed by Mai's with eighteen pages, Shiori's with twenty, and finally Ayu's with forty-eight pages. 
(Source: abridged wikipedia)

This is a crossover of Key series: Kanon and AIR. Each chapter is a seperate mini-story from the two series.

Akiko Minase