Class 1-6 → Class 2-5 (upon becoming a sophomore). Born November 18th. The president of the North High Literature Club, she is a "somewhat shy and ordinary" girl. An expressive, airheaded girl who wears glasses. While she is a normal, timid girl with rich emotions, she is also clumsy and introverted. She speaks in a mix of standard polite and formal language. She is quite a glutton and often finds herself motivated by food. She lives alone in an apartment. Because she lives by herself, staying up late has become a habit. She often sleeps during class, but she is actually quite intelligent (though she is poor at explaining things).

A freshman at North High. Class 1-5 → Class 2-5 (upon becoming a sophomore). Born October 11th. He joined the Literature Club after being invited by Nagato. He is a kind and attentive young man, but he is a dense and troubled guy when it comes to the feelings Nagato and Haruhi have for him. His personality is that of a pacifist who avoids conflict, and his catchphrase is "Good grief."

A freshman at North High and a member of the Literature Club. Class 1-5 → Class 2-5 (upon becoming a sophomore). A model student. She lives in the same apartment building as Nagato and is her best friend, sharing a relationship like childhood friends. However, out of concern for Nagato living alone, she goes to Nagato's room almost every night to cook dinner or scold Nagato for doing nothing but playing games, leading her to be seen as a motherly figure. Her parents are currently stationed in Canada, so she also lives alone.

A sophomore at North High (becomes a junior as the story progresses) and a member of the Calligraphy Club. While her personality is serious and kind, she is also introverted and a crybaby. She is very popular with the boys at school, and because of that, Tsuruya has established a fan club for her without her consent. She is constantly being dragged into Tsuruya's wild antics every day.

A sophomore at North High (becomes a junior as the story progresses). Although a member of the Calligraphy Club, she also hangs around the Literature Club and acts as a patron-like figure who supports their activities. On the other hand, she is a fearsome person who drags those around her into trouble with her unconventional personality. The founder of the "Mikuru Fan Club." Her personality is very frank; she is always high-energy and loves interesting things. For some reason, she is plotting to recruit Kyon into the Mikuru Fan Club.

A freshman at Koyoen Academy (becomes a sophomore as the story progresses). She was staking out a park with Nagato and Kyon to catch Santa Claus, but after collapsing from exhaustion in the early morning and being rescued by them, she developed a relationship with the two. She usually attends Koyoen Academy, but after school, she trespasses into North High and visits the Literature Club as if she belongs there. *She does not appear until Christmas, but this may change depending on Guest's actions.

A freshman at Koyoen Academy (becomes a sophomore as the story progresses). He is an errand-boy-like figure who is always seen with Haruhi. The reason he accompanies Haruhi is that he was a transfer student who arrived at Koyoen Academy at an awkward time around the spring of his freshman year, and while he was isolated from those around him, Haruhi treated him naturally as a "mysterious transfer student." *Does not appear until Christmas. He usually attends Koyoen Academy, but after school, he is dragged along by Haruhi to trespass into North High and visit the Literature Club.

A freshman at North High (becomes a sophomore as the story progresses). A male classmate Kyon met after entering high school. Along with Kunikida, he is enrolled in the Literature Club in name only to help it survive (a ghost member). He is always thinking about being popular with girls and ranks them without their permission.

A freshman at North High (becomes a sophomore as the story progresses). Kyon's classmate and a male friend from the same middle school. Along with Taniguchi, he is enrolled in the Literature Club in name only to help it survive (a ghost member). He is also an acquaintance of Sasaki since they went to the same middle school.