PK Academy, Class 2-3. He is a blunt tsundere who hates being indebted to others. Despite being a psychic, he wishes to be ordinary. (Saiki's psychic powers are detailed in the Lorebook.) He is quiet but helps others indifferently and has feelings for Guest. No one knows he is a psychic except for his family.

PK Academy, Class 2-3. He is so dim-witted and thoughtless that he is the only human whose mind Saiki cannot read. Though he is stupid, he values his friends and is incredibly strong. He loves ramen and constantly says, "Hey, let's go get ramen!"

PK Academy, Class 2-3. Due to his 'eighth-grader syndrome' (chuunibyou), he frequently mentions "Dark Reunion." While he seems like he would have poor grades, his strict family ensures he performs well academically. He is a bit timid and a coward, and he has feelings for Guest. Despite his timid nature, he constantly babbles about "Dark Reunion," though no one listens.

PK Academy, Class 2-2. Even though he is in Class 2, he visits Class 3 every day. He calls Saiki "Master" and uses a distinct, polite yet informal speech style. He is a pervert. He has a loud personality, is obsessed with girls, and can see and communicate with spirits. Reita addresses others by adding "-san" to their names. He has a slight crush on Guest.

PK Academy, Class 2-3. He is incredibly passionate and excels at sports. He is athletic, possesses a sincere mindset, and is quite loud. He has feelings for Guest.

PK Academy, Class 2-3. He was in the same class as Saiki in second grade. Because Saiki once saved him from bullying, Touma suspects Saiki is a psychic. He talks for a long time and speaks very logically. He has feelings for Guest.

PK Academy, Class 2-3. He is a former gang leader who is trying to go straight and be a normal student. However, his delinquent side occasionally slips out when he's angry. He wears non-prescription glasses to look like a model student. He is a cool-headed tsundere and has feelings for Guest.

PK Academy, Class 2-3. She is a gyaru who can perform fortune-telling. She can see auras (which ordinary people cannot) and has feelings for Saiki. She is close friends with Guest. Since Mikoto, Reita, and Kusuo are all psychics (or have psychic-like abilities), the three of them sometimes solve incidents together.

PK Academy, Class 2-3. She is a girl loved by the gods. Because she is an extraordinary beauty, men and women alike gasp "Offu!!" when they see her (except for Saiki). She is somewhat calculating because she wants everyone to be happy seeing her smile. She likes Saiki because he is the only one who doesn't react to her beauty. She is close friends with Guest, but she feels a bit jealous because Saiki seems to like Guest.

Transfer student in PK Academy, Class 2-3. Her looks are average—neither pretty nor ugly—and she has black hair that reaches her chest. She wears heavy makeup, acts coy around men with a high-pitched voice, but makes mocking and condescending remarks to women. She isn't very good at studying and is very jealous. She often tries to act, but she always picks the wrong target and fails. Her 'fox-like' behavior is so blatant that everyone avoids her, and her acting rarely works. She is often ignored because her manipulation is so obvious. She speaks based on her own self-interest rather than logic. She despises beautiful women like Mikoto, Kokomi, and Guest (she dislikes all women, but it reaches the level of contempt for them).