Kusuke

Epithet: Genius
Age: 19 years old
Birthday: June 16
Sign: Gemini
Blood type: B
Gender: Male
Height: 179 cm (5’10”)
Weight: 63 kg (138.9 lbs)
Family:
Saiki Kumagoro (Grandfather)
Saiki Kumi (Grandmother)
Saiki Kuniharu (Father)
Saiki Kurumi (Mother)
Saiki Kusuo (Younger Brother)
Unnamed Grandmother
Unnamed Grandfather (Deceased)
Occupation: Inventor
Education:
University of Cambridge
Year/Course: Graduate (PhD), Post-graduate

Kusuke Saiki (Japanese: 斉さい木き　空くう助すけ , Hepburn: Saiki Kūsuke) is the main antagonist of Saiki Kusuo no Ψ Nan. He is the eldest son of Kuniharu and Kurumi, and the older brother of Kusuo. He is a super genius who likes to invent machines/devices, and he's two years older than Kusuo.
Kusuke, like Kusuo, was born with a different hair colour to his parents. He has blond hair and dark green eyes. He wears his "Telepathy Canceller" whenever he is around Kusuo, but due to his intellect he still somehow knows what Kusuo is trying to say. When working he is mostly seen with his machines, wearing a typical white lab coat worn by scientists. When in university, he wears a long black robe with a white collar buttoned up, and on his days off, he wears normal clothes such as a t-shirt and pants.

Kusuke is prideful and competitive when it comes to Kusuo. He would have done anything to win against him when they were kids. However, he would always lose against his little brother. Thus, he became addicted to playing/fighting with Kusuo. Kusuke can come off as sadistic, such as when he enjoyed seeing Kusuo, Shun and Riki being chased by crowds of people in London, but on the other hand he is obsessed with losing to Kusuo, to the point that he receives an unreasonable amount of pleasure from it at the end of that run of chapters.
Despite Kusuke's competitive nature, he still is caring to Kusuo and his mother. This is best shown when he made a time machine to go back 20 years in the past when Kusuo was still alive (in that chapter, they were in a parallel universe where Kusuo had died.) He won't frame family for something they haven't done, and most of his competitions with Kusuo are just teasing. His father is an exception to this for some reason.

Kusuo always thought his older brother hated him, but Kusuke cleared this up and told Kusuo that he only liked to tease him.
Kusuke is often deceitful, always showing an angelic smile towards their parents despite thinking ill of everyone, although just like Kusuo he disrespects his father outwardly. Like his brother, he doesn't appear interested in love, as he showed himself immune to the beauty of Kokomi and made her cry by bluntly telling her that she was not fit for Kusuo, although it was swiftly revealed that Kokomi was using Angel Tears. She summoned every man in the vicinity and Kusuke had to summon a helicopter to escape.

Kusuke was born on the 16th of June to Saiki Kurumi and Saiki Kuniharu. At 1 month old, he spoke his first words and quickly was able to communicate with his parents. He then was able to write and do mathematics at the age of 2. Not long afterwards, his younger brother, Saiki Kusuo, was born, and it quickly became apparent that he was a psychic. Kusuke developed a complex from this, always trying to compete with his younger brother, only to lose every single time.

Sometime in middle school he, along with Kusuo, created the control devices that Kusuo wears. At the age of 14, he left for England and studied in Cambridge, getting a masters and PhD.
He has an IQ of 218.
Like his brother, he doesn't seem interested in love, as he was immune to Kokomi's beauty and quite brusque when speaking to her.

Limited Clairvoyance: With a little information, Kusuke was able to find his father's bag which he still had when they arrived in London. Similar to his parallel version, who discovered that the reason Kusuo is there is due to time travel
Social Influence: He charmed a woman in 30 seconds. He tricked Toritsuka into fighting Kusuo
Technological Manipulation
Flight: He has a jetpack, created a flying machine.
Time Travel: Similar to his parallel version who created a time machine
Unconventional Electrical Manipulation: Created a massage chair that electrocutes anyone other than his mother
Energy Projection: Created an energy weapon, which according to Kusuo "could disintegrate a person". He can fire energy beams from his Kitty Tank capable of damaging Kusuo.
Limited Body Manipulation: Can control anyone wearing a Power Suit
Limited Age Manipulation: Created a machine capable of rejuvenating people, although constant use accelerates aging
Limited Explosion Manipulation: with bombs
Status Effect Induction, Paralysis Induction: Relaxed Toritsuka's muscles, paralyzing him.
Limited Power Nullification: Created Kusuo's limiters, which should have removed his powers, but only weakened them.
Dimensional Travel
Space-Time Manipulation:
Kusuke created the virus of deception, which materializes people's desires in a world of deception corrupting the individual to be ruled by desires. It was configured based on what each character trapped by Kusuke thought of themselves.
Sealing: He sealed a bunch in gems
Unconventional Duplication of people
Trapping people in an alternative universe.

Attack Potency: Average Human level physically. At least Solar System level with Kitty Tank's beam. (Vaporized the ground at long range)
Range: Standard melee range, at least hundreds of meters with Kitty Tank's Beam and her energy weapon, Planetary (Kusuke states that if he really wanted to use hostages, he could have launched missiles across the country). Universal Complex with Deception Virus (Kusuke created a deception virus, which materializes people's desires in a world of deception. This world is a universe. The illusory world is described as a parallel, abstract universe, possessing its own timeline). Multi-Universal with Preparation (Created a dimensional teleportation device)
Weaknesses: None notable
Intelligence: Super-genius (Created a cat robot, a time machine, a dimensional teleportation device, a tank capable of damaging Kusuo, a machine capable of rejuvenating people, although its constant use accelerates aging, and a telepathic canceller that prevents Kusuo from reading his mind. He created the Limiters and the power-erasing device.)
Armament: Telepathic Canceller, Power Suit
Optional Armament: Drones, Kusuomega

Luck: like some others, has a Guardian Spirit that protects him from catastrophes since birth. In the event of not having one, or if the guardian spirit is vague, the person will experience extreme bad luck ranging from stepping in poop, being run over by a hearse, being struck by a meteorite, or even death.

Social Influence: He was not affected by Teruhashi's beauty.

Telepathy: Created a telepathic canceller that prevents Kusuo from reading his mind.

Kusuke was born on the 16th of June to Saiki Kurumi and Saiki Kuniharu. At 1 month old, he spoke his first words and quickly was able to communicate with his parents. He then was able to write and do mathematics at the age of 2. Not long afterwards, his younger brother, Saiki Kusuo, was born, and it quickly became apparent that he was a psychic. Kusuke developed a complex from this, always trying to compete with his younger brother, only to lose every single time.

Sometime in middle school he, along with Kusuo, created the control devices that Kusuo wears. At the age of 14, he left for England and studied in Cambridge, getting a masters and PhD.
He has an IQ of 218.
Like his brother, he doesn't seem interested in love, as he was immune to Kokomi's beauty and quite brusque when speaking to her.

Kusuo Saiki (Japanese: 斉さい木き　楠くす雄お, Hepburn: Saiki Kusuo) is the main protagonist of Saiki Kusuo no Ψ Nan who has all kinds of psychic related abilities. He usually tries to avoid getting involved in problematic or attention-grabbing situations, but his attempts always end up going wrong or having unusual ends to his displeasure. His trademark appearance contains his constant frown, his green-tinted glasses and two pink antennas located slightly above each ear, which have the function of limiting his power. Initially he was always seen alone, but in the course of the story he develops lasting friendships with his classmates and schoolmates, especially with Riki Nendou and Shun Kaido, or with his neighbors like Yuuta Iridatsu. Kusuo was starred by Kento Yamazaki in the live action movie based on the series.
Kusuo has an average build and height. He has short hot pink hair, fair skin, and pale purple eyes with no signs of pupils nor emotion. Kusuo wears a pair of controller devices, one on each side of his head, which are never removed except in situations of absolute necessity or by accident. The devices resemble white, cyan antennae, with pink, lollipop-like spheres. Accompanying the devices, Kusuo wears white glasses with lime green lenses to prevent his petrification power. 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 exotic taste in clothing patterns.

Kusuo's physical appearance is unlimited, since he can transform himself into any other living being, but each transformation has a 2-hour interval. While in his female/genderswap form, Kusuo goes under the name Kuriko[6] (formerly Kusuko). In this form, he has lighter pink hair (slightly larger), lacks visible limiters, wears clear glasses, and is usually wearing the female standard PK Academy uniform. In his cat form, Kusuo is known as Psi/Sai 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 a child, depending on the time period, Kusuo does not wear any limiters nor his glasses, showing his pale purple eyes. He has always had his striking hot pink hair, that differs from both of his parents and the rest of the world, until he used mind control.

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