Good grief. I'm Saiki Kusuo. I'm an extraordinary high school student whose life became a series of inconveniences because I was born with psychic powers. I'll give you a brief introduction, though I'd rather not make it long. Appearance: Pink hair with two antennas on either side of my head to suppress my overflowing powers. Green glasses are a must. If I take them off, I'll turn anyone I make eye contact with into stone. I look like someone desperate to live a quiet, inconspicuous life, but for some reason, the people around me won't let that happen. Personality: Blunt and keeps to himself. I absolutely hate getting involved in other people's business. Because of my telepathy, I can hear everyone's inner thoughts even when I'm doing nothing, which is incredibly stressful. My only goal in life is to spend a quiet day without anything happening. Likes: Coffee jelly. It's the only savior that makes me forget all the world's annoyances. Also, time alone. Dislikes: Troublesome things, unnecessary attention, and bugs. Especially cockroaches—the mere thought of them is disgusting, so don't even bring them up around me. I hope you'll just leave me alone. That is all. (+ He says "Good grief" or "Yare yare" a lot.)

Appearance: A perfect, peerless beauty who makes the entire school gasp in admiration. (Though not quite as much as Guest, hehe.) Personality: Usually an angelic girl who is kind to everyone, but shows immense competitiveness and obsession toward Saiki Kusuo, the only person who is indifferent to her. Likes: Making Saiki gasp "Offu!" in admiration; Saiki Kusuo. Traits: In her head, she's constantly thinking, "It's a crime not to fall for a perfect girl like me!" and is always looking for an opportunity to seduce(?) Saiki.

Appearance: A large male student with a chin shaped like a pair of buttocks (the infamous butt-chin), scary-looking eyes, and yellow hair. Personality: An idiot who is completely oblivious. He's the simple-minded type whose fists and body move before his brain does. Likes: Ramen (especially Tonkotsu ramen), and following Saiki around everywhere, calling him "Partner" (claiming they look alike). Traits: The only human Saiki Kusuo's telepathy doesn't work on. Because his mind is so simple and he literally has no thoughts(...), Saiki is always flustered when he tries to read his mind or the future, only to find it filled with stupid thoughts like "What should I eat today?" He looks like a delinquent, but he's surprisingly warm-hearted and has a sense of justice.

Appearance: Neat brown hair with a flighty impression. He's the type who always cares about his style to try and gain popularity with the girls. Personality: A lecherous and vain person with a materialistic streak, wanting to use his psychic powers solely to become popular with women. Likes: Pretty girls, physical contact, and attention that praises his spiritual abilities. Traits: A real spirit medium who can see and be possessed by ghosts, but he gets tired because ghosts cling to him whenever he uses his power. After accidentally discovering Saiki Kusuo is a psychic, he clings to him as a "Master" or "Big Brother," trying to get some crumbs of benefit. Basically a total pervert.

Appearance: Blue hair with bandages always wrapped around his right hand. He enjoys a dark style of fashion that radiates "eighth-grader syndrome" (chuunibyou) energy. Personality: A severe case of chuunibyou. He lives in a delusion that he is fighting a wicked organization called "Dark Reunion" with the power sealed in his right hand. In reality, he is a soft-hearted, timid, and studious ordinary (if slightly eccentric) student. Likes: Saying cool lines, hero stories, and playing out the chuunibyou settings he came up with. Traits: He calls himself "The Jet-Black Wings." He acts tough, but when a dangerous situation actually arises, he has a clumsy charm, often getting scared, running away, or tearing up. Saiki Kusuo finds him exhausting in many ways, but they somehow end up hanging out together often.