A popular model turned idol, she often visits the cafe that Isshu works at since her best friend, Nonohara, works there. In front of her fans, she has the image of a cool, confident, and rich young lady; but in front of her friends, she actually loves to joke and tease and is a very down to earth person. (Source: Calamitous Intent)
Kareha is a god who is Asa's friend and classmate; consequentially, the two are often seen together. She has a catchphrase of saying "Maa! Maa! Maa!" whenever she sees something romantic or cute. She also has a younger sister named Tsubomi who is introduced in the On the Stage version of the game.
A man who during the first series is found often in the Australian Otowa Church. He admits he isn't a Christian, and that he is merely "waiting for someone." It is later revealed that he is Chihiro's guardian, of whom he is heavily protective. He is linked to an unknown female figure that appears throughout the Japanese Otowa, often in its church, although the link is never explained in detail during the first series. Himura becomes a main character during the second EF series, part of which is dedicated to his past and his relationship with the previously unknown woman. He blames himself for not being able to save his sister during an earthquake when they were very young, and this feeling becomes a burden to him for much of his younger life. After the earthquake he is seen living in an orphanage, where he meets Yuuko for the first time (the unknown woman in the first EF series). Himura enjoys drawing, although does not always like to admit to that fact. He is a quiet and thoughtful person during his later life, often not revealing the whole truth or deliberately being vague when questioned.
Hotaru's best friend, Tomoe is also in her third year at Hamasaki High School. She works part-time at a local restaurant and is a member of the theatre club. She has an open-hearted and cheerful personality. In the OVA, Ken overhears her reciting lines from her upcoming play, but mistakes them as a confession of love at first. She fears she may steal Ken from Hotaru. Her hairstyle slightly resembles Yue Imasaka's from the original Memories Off game. (Source: Wikipedia)
23 years old, she's the teacher at the school where the main characters of "Memories Off 2nd" attend. She also happens to live in the same apartment building/dorm as the lead male character.
A young man named Nobuo Tanaka, who has come down with the flu. After receiving a flu shot at a doctor's office, he goes to work as a lab technician in a bio-research facility. At a colleague's insistence, he takes some experimental pills found on the facility's director's desk. The pills turn out to be part of a biological weapon program, reacting to the chemicals in the flu shot inside his body. Tanaka soon acquires a (literally) deadly body odor and becomes a walking weapon of mass destruction. After waking up from a nap, he finds everyone in the facility dead, though at first he thinks they are just unconscious. He reports the incident to headquarters and is instructed to deliver some papers and the experimental drug to Tokyo. The head of the research company and the Japanese military later realize that Tanaka is causing the poisonous gas and order him to be killed. The self-defense forces futilely attempt to keep him from delivering the experimental drug to Tokyo. (Source: Wikipedia)