藍川 有紗

Makoto's underclassman who is 1/4 of Scandinavian descent. She knows Makoto from church, and for whatever reason she came to a Japanese art academy. She works as a waitress with Makoto at Kyouko's café: the Modulor.

Inconsistent with age and height, although she appears to be mature and reliable, she is actually introverted and unsociable. Because she desperately wants to hide it, when in class she feels isolated. She works at the same place as Makoto, and because she can talk to him normally, she trusts him.

Later, thanks to Makoto, she becomes friends with Tsukuyo, Asuza and Madoka.

Arisa seems to be able to speak at least five languages: Finnish, Swedish and Japanese as her mother tongues as well as French and English. 

Arisa seems to have been in love with Makoto for a very long time, however only Kyouko seems to have noticed it, at first.

Arisa does not really have a favorite artistic field as she mainly helps her Senpais to finish their work and she is very interested in everything she does. However, we learn later that Arisa seems to be more attracted to painting.

During the game, Arisa passes her first year and moves to the next grade (second year). At the end of the game, she passes her second year and moves in third year.

Even though Arisa is of a shy temperament, she remains a very strong woman, a true iron lady who does not let herself get on her feet when someone tries to intimidate her, to such an extent that she scares even those who have tried to intimidate her. 

Hijiri is the first friend that Arisa made by her own.

Although she is not yet of legal drinking age, Arisa drinks alcohol regularly and she can handle it very well. However, she once had too much drunk and ended up completely drunk and slumped on the floor. This story still makes Kyouko and Makoto laugh a lot.

Arisa seems to masturbate using as a fragrant stimulant the tissues she found in Makoto's trash can and which were used for the same purpose.

The fact that Arisa is a perfect Finnish-Swedish bilingual can give us a clue about her region of origin in Finland (in one of the bilingual regions of the south-west of the country), her ability to speak French also gives us an additional clue, suggesting that she must come from the region of Uusimaa./

Arisa is mentioned in Ai Kiss 2 as being one of the famous graduate.