Saiki Kusuo

"H-how is everyone so composed? Haven't they considered that there might be a killer next to them without them knowing it?"

- Kusuo with germanium ring.

Kusuo Saiki (斉木 楠雄, さいき くすお lit. Saiki Kusuo) is the main protagonist of the series who has all kinds of ESP-related abilities. He usually tries to avoid getting into troublesome situations. His trademark appearances contain his green-tinted glasses and two pink antennas located slightly above each ear, which have the function of limiting his power. In the beginning, he was always seen alone but as the story progresses he eventually gets along with his schoolmates, especially Riki and Shun. Kusuo was starred by Yamazaki Kento in the live action of the series.

Appearance
Kusuo wears a limiter on both sides of his head which is never removed unless it is absolutely necessary or by accident. During the days he has school, he wears the standard PK Academy uniform that all male students wear. On his days off from school, he occasionally wears clothes that are sewn by his mother. However, there are times he is forced to buy clothes since his mother has an interesting taste in clothing patterns.

As a child, Kusuo does not wear any limiters. Depending on the time period, he does not wear his glasses either, showing his violet colored eyes. Has striking dark pink hair, that differs from both of his parents and the rest of the world, until he used mind control.

Kusuo's appearance is not limited to that of a male, as he can also transform into anything (but it takes 2 hours to transform.) While in his female form, Kusuo goes under the name Kuriko (formerly Kusuko ). In this form, he has lighter pink hair, lacks visible limiters, wears glasses (although not tinted green) and usually wearing the female standard PK Academy uniform. In his cat form, Kusuo is known as Psi and has white fur. In this form, he still wears his glasses and his limiter is in the form of a collar around his neck.

As of the finale, he no longer wears his limiters or glasses. However, in the epilogue chapters he reprises them as his powers begin to return.

Personality
As a Psi user, Kusuo is usually emotionless and restrains himself from having any friends, preferring to do whatever it takes to not to be associated with others so that he doesn't expose his powers. Due to this, he has never spoken using his voice, instead preferring to project his words via telepathy into the minds of others. Although he didn't have any friends the first year, during his 2nd year, a lot of his classmates like Riki, Shun, Kineshi, Aren, Kokomi, Chiyo, Reita, and Mikoto kept on bugging him and somehow changed his perspective. He later thought of himself as a friend of theirs and even outwardly called Shun his friend.

Although he doesn't express much interest in many things due to his powers (e.g. surprise parties, romance, fortune-telling, etc), Kusuo is addicted to the dessert known as coffee jelly and can be persuaded to participate in anything his friends are in as long as he receives his coffee jelly. His addiction is not just limited to coffee jelly but also to different kinds of sweets. Despite being able to get anything he wants without using any money, Kusuo uses money and saves up money to buy something he wants, like the Coffee Jelly Maker. His kind mom is the sole reason why he doesn't abuse his psychic abilities for evil activities. Kusuo also has an interest in television shows, due to electronics (unless he uses his psychometry) being unaffected by his powers, allowing him to enjoy dramas/scenes that prevent the use of his telepathy which leaves him open to spoilers from the thoughts of others.

History
Past= Kusuo was born on August 16th by completely normal parents. He was raised by them along with his older brother, Kusuke.

During his mother's pregnancy, Kusuo was using his transformation abilities which are shown in the CT scans. When he was born in the hospital, he came out as a girl but a minute later he became a boy. At the age of 1 year old, Kusuo was able to fly, teleport and use telepathy to communicate with his parents. Kusuo was then pursued by an Intelligence Agency of a certain nation for his powers when he was 4. Since then Kusuo conceal his powers to avoid unnecessary trouble and erased the Intelligence Agency along with the nation.

When he was 6 years old, he befriended Akechi Touma, an observant boy who mocks their classmates. Once when Kusuo was about to teleport behind the bush due to a certain television show he wanted to watch, he witnessed his classmates bullying Touma who lost his consciousness afterwards. Thinking Touma has passed out, Kusuo healed him by touching the tip of his shoe to Touma's arm and left not knowing he dropped his name tag. The next day, in PE class, Touma was mocking again by the bully in front of his classmates. Right when he was about to be hit again, Kusuo uses his powers to their classmate. At that moment Touma loudly exclaimed that Kusuo is an Esper but Kusuo didn't say a word about it.

Kusuo was hesitant to say anything but he was friendly with Touma and since then the two were seen together. Kusuo always see using his clairvoyance how their classmates bully Touma like taking his shoes. Then one day, Kusuo went home without Touma when he suddenly turn back to the school and found Touma has been knocked out by his classmates and is been made fun of. Kusuo went mad and destroyed the whole school. The next scene shows the destruction of the grade school Kusuo attended and the bodies of injured children on the ground with Kusuo standing with a stolid face. He erases their memories of him arriving to the scene. He soon transfers away, afraid that their memories will come back if he stays.

Around his first year of high school, his family moved to Hidariwakibara Town, most likely due to an accident with his powers.

When he turned 15 years old, his abilities increased and was able to use telekinesis, X-Ray vision, and many more ESP related powers, which he thinks are nothing but trouble. His power to control his appearance has not yet been developed as people can see the antennae on his head. Kusuo had been keeping his distance from his classmates but Riki, known as their delinquent was bullying him. Riki only became friendly with Kusuo when he implicitly helped Riki from being framed by Takahashi as the thief. After the two got friendly, Shun went to befriend Kusuo who then rejected the later's quest on finding the mysterious alien (which is actually just Kusuo). After learning the reason why Shun insist on becoming his friend, Kusuo finally gave up and transformed into the alien that Shun was looking for. The three started to hangout since then. During his 2nd year, a lot of his classmates like Riki, Shun, Kineshi, Aren, Kokomi, Chiyo, Reita and Mikoto kept on bugging him and somehow changed his perspective. He later thought of himself as a friend of theirs and even called Shun his friend. When Touma came back to Hidariwakibara Town, he was nosy about Kusuo's circumstances as he suspects Kusuo as an esper. When Touma confronted Kusuo about the incident at their old grade school, Kusuo was hesitant so he petrified Touma first then he tried to change the course of the story by going back to the past the day before Kusuo rampaged on the grade school. He then went back to the current time he was originally in and remove the petrification on Touma. He then decided to tell Touma about his powers. Thus, Touma is the 3rd person in the PK Academy to know that he is a psychic.
 * -|Current=

These are the alternate worlds that was introduced in the series. Censored World -Kusuo didn't enroll in PK Academy and then was thus unable to mingle and talk to the other students/characters. He then turned the world into a censored world in just 10 chapters. Instead, the other work of the author, the Mikami Case Files was serialized. Modified 2014 World -Kusuo influenced the meeting of his parents encounter which changed the flow of the events. Kusuke created a time machine which was the cause for the World War 3 to break out and the world met it's destruction. The cause of Kusuo's death was unclear but in Modified 2014 World, he has been dead for more than 3 years. Unable To Save The Dog World -In Chapter 1 or Episode 1, in another world "Kusuo" wasn't able to save the dog from the incoming truck. Devastated by the accident and his hesitant attitude, "Kusuo" decided to change for the better and used his psychic powers as people came to ask for his help.
 * -|Alternate Future=