Katsuya Serizawa

Katsuya Serizawa (芹沢 克也, Serizawa Katsuya) is a powerful Esper who was formerly a part of the Claw's Ultimate 5. Currently, Serizawa works at Spirits and Such Consultation Office.

Appearance


Serizawa has curly dark-brown hair, messy eyebrows and eye bags, is quite tall and has broad shoulders and a handsome face.

During his time at Claw, Serizawa had long hair with tight curls, a thin mustache, and stubble. He wore an orange hanten over a black long-sleeve shirt with grey sweatpants, and bright green crocs. He carried his white umbrella with him at all times. After the fall of Claw, he no longer carries his umbrella casually.

After being invited to work with Reigen and Mob at the agency, Reigen trims Serizawa's hair and shaves his face. When working at the agency, he wears a blue two-piece business suit.

Personality
Serizawa was a withdrawn and naive person before leaving Claw. All of his trust was solely placed in Toichiro, looked up to him as a personal savior, and followed his orders without question. Before beginning his work at the Spirits and Such Consultation Office, if he were separated from his umbrella he would panic and completely lose control of his psychic power, which would cause heavy damage to his surroundings. He was haunted by a deep fear of his own power.

Serizawa's constant fear of losing control of his powers made him incredibly anxious. Due to his years under Toichiro Suzuki, he seems to have difficulty acting without guidance from others. However, after the fall of Claw, joining Reigen's agency, and starting to attend night school, Serizawa begins to come out of his shell and be more independent.

Serizawa is shown to care about others' well-being, even going as far as keeping himself in his room for the sake of others' safety. At present, he's more careful with his feelings and considers his thoughts more before giving advice or commentary. He's gained a little more confidence by working alongside Reigen and making friends with the people in his classes.

By the time of the REIGEN spin-off, Serizawa seems to be competent and quite confident. His personality growth is displayed when he shows off his powers for Tome and gives a lecture to help her become a psychic.

History
At age 12, Serizawa became so overwhelmed by fear of his own psychic powers that he refused to leave his bedroom for fear of hurting others. Lacking guidance and companionship, and not helped by the counselors his mother had hired, Serizawa remained in his bedroom for 15 years. His self-imposed confinement lasted until he met Toichiro, who coaxed him to leave by offering him an umbrella and encouraging him to view it as an extension of his room. Serizawa followed him, hoping to learn to control his powers and rejoin society. Instead, Suzuki exploited Serizawa's power to further the aims of Claw, leaving him and his well-being utterly dependent on both himself and the umbrella. Serizawa convinced himself that Claw was a company, that Suzuki was its president, and that he himself was an employee.

World Domination Arc
When Joseph reveals his status as a double agent to Toichiro, Serizawa appears and lectures him about how lying isn't a very nice thing to do. Joseph tries to restrain him with his smoke, but he breaks free and uses his powers to blast him out the window.

Climbing the stairs to confront Suzuki, Mob encounters Serizawa and bluntly opines that he is being used. Serizawa refuses to believe Mob's opinion and argues against it, and Mob retorts that he was following the wrong person. Accepting the inevitable, Serizawa fights Mob using his umbrella as both a weapon and a shield, but is eventually won over by the sincerity and empathy of Mob's 100% Friendship. By sharing his energy with Serizawa, Mob shared his memories of true friendship with Serizawa, allowing him to understand the true nature of his relationship with Suzuki.

Serizawa would later use his umbrella to save Reigen from Suzuki's wrath. Suzuki retaliated by blasting Serizawa with psychic energy until his umbrella was torn to shreds, then draining Serizawa's power to use for himself.

Serizawa is present at Toichiro's arrest. His former boss then tells him that he never really viewed him or any of the Ultimate 5 as his comrades, so there was no need to worry about him. Then, in his first show of actual affection and consideration, Toichiro tells Serizawa that people would try to manipulate him because of his lack of self-confidence, and to not let them.

Divine Tree Arc
Serizawa accepts Reigen's offer and begins working at Spirits and Such Consultation Office, hoping to improve his life and style. By helping Reigen with exorcisms, he hopes to help make the world a better place, and he soon starts taking night classes at a local school to make up for his lack of formal education.

Before starting with his first client Reigen decides to cut his hair and shave his beard.

He and Mob exorcise Yokai, drawn to the Divine Tree.

Telepathy Club Mini-Arc
Reigen invites Serizawa out for drinks on New Year's Eve, but he already has plans with friends from school.

???% Arc
When ???% destroys the city, Serizawa and Reigen go check out what is happening and see the tornado. Reigen suspects that Mob is in the middle of it, and asks Serizawa to help escort him to the center. Serizawa agrees and protects Reigen with his umbrella as they walk through it. However, his power begins to be sapped away by Mob's tornado, and at the request of Reigen, he retreats.

REIGEN Manga
In the spinoff, Serizawa continues participating in daily work at Spirits and Such. By this time, he is promoted to the role of Deputy Director of Spirits and Such. He convinces Reigen to allow Tome to come along on some of their exorcisms and joins Reigen in following Tome on her trip with Origo Hoshida. He then helps with the subsequent rescue by dissipating the illusion of Reigen that was dragging Tome and Hoshida deeper into the woods.

When Tome is cursed, Serizawa immediately tries to remove the curse, but fails and is thrown against a wall, knocking him unconscious.

Epilogue
Serizawa participates in Reigen's birthday party and invites Sho.

Powers & Abilities
When he was a member of Claw, Toichiro stated that Serizawa is the most powerful of the Ultimate 5. He is strong enough to block an attack from Suzuki at 3% of his power output as well as to put up a fight against Mob and hold the edge against him for most of their battle. Serizawa is also shown to be a rather talented esper, as seen when he was demonstrating his psychic powers to Tome and was handling multiple tasks at the same time (watering plants, sorted papers in the file cabinet, cleaning floors, preparing tea, moving Tome to sit on a chair and speaking through a radio). His psychic aura takes on a purple color with a TV static pattern within.

Quotes

 * (To Mob) "Please... don't make me angry. Do you know how much your words hurt?"
 * "Ability... I can build... plastic models really well. Ah... What else..."
 * "How awesome is that... I talked to the prime minister."

Etymology

 * The name Katsuya means "overcome" (克) (katsu) and "to be, also" (也) (ya).
 * Katsuya's surname Serizawa means "celery" (芹) (seri) and "swamp, marsh" (沢) (sawa/zawa).

Notes & Trivia

 * By the time Serizawa begins working at Spirits & Such, he lives alone.
 * Serizawa is reluctant to try spicy foods.
 * Serizawa regularly consumes cup noodles.
 * Serizawa is shown to be very fond of children - he is friendly toward Sho, the only esper who doesn't want to fight Mob (because he is a middle schooler), and protective of Tome in the REIGEN spinoff manga.
 * Serizawa has not told his mother about his terrorist past - she is unaware of what Claw is as well.
 * Serizawa considers Reigen to be a respectable person.
 * Serizawa is described as being honest and sincere, but too estranged from the world.
 * Character Designer Yoshimichi Kameda states that he did not use the umbrella when it was raining.
 * When asked about Serizawa's preferences during the summer break, ONE tells that he likes to spend his time indoors, heavily involved in TV, games, and the internet.
 * During his episode of Salt Middle School Broadcasting Club, Serizawa describes carrying tea leaves, a teapot, and a travel umbrella around with him.
 * Serizawa's voice actor Takanori Hoshino imagines him with the blood type AB, a Taurus, born in April.
 * Official Mob Psycho 100 art released in May of 2019 features Reigen and Serizawa in traditional Japanese wedding attire standing next to each other. They are each holding bouquets; in front of them are Mob and Ritsu, who are presumably the "flower boys" for the wedding. It's unclear what Studio BONES was insinuating with the art, but Serirei fans hurriedly embraced the picture as proof that Serizawa and Reigen finally got married.
 * An interview for Animedia released in November of 2022 states that Reigen is "the senpai of Serizawa's life" and that Serizawa "holds respect and affection for Reigen." The term used in this interview, "敬愛する", literally translates to 'adore' or 'to respect and love'.