Katsuya Serizawa

Serizawa Post Domination

Katsuya Serizawa

Character Info
Kanji 芹沢克也
Romaji Serizawa Katsuya
Race Human (Esper)
Gender Male Male
Status Alive
Voice Actor(s) Japan Takanori Hoshino
Technical Info
Age 30[1]
Professional Status
Affiliation Spirits and Such Consultation Office
Claw (former)
Ultimate 5 (former)
Manga Chapter 77
Anime Episode 21
Image Gallery

Katsuya Serizawa (芹沢克也, Serizawa Katsuya) is an extremely powerful Esper, was formerly a part of the Ultimate 5 and member of Claw. He now works at Spirits and Such Consultation Office.


Serizawa former look

Serizawa's former look

Serizawa is a man of magnum height and build. Whilst still a member of Claw, he had curly black hair, somewhat heavy eyebrows, a thin mustache, and stubble. He wore an orange robe over a black shirt, along with black pants, 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.

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

Tumblr ozpx8yA0by1rsv9nmo1 250

Serizawa's Crocs


Serizawa is very sheltered and naive. He placed all his trust in Toichiro Suzuki and looked up to him as a personal saviour, following his orders without question. His face tends to clearly reflect his emotions. If he is separated from his umbrella, he panics and completely loses control of his psychic power, which causes heavy damage to his surroundings. He is haunted by a deep fear of his own power.

Serizawa is a very nervous person. Due to his years under Toichiro Suzuki, he seems to have difficulty acting on his own without guidance from others. However, after the fall of Claw and joining Reigen's agency, Serizawa is slowly coming out of shell and becoming more independent.

Serizawa, before and during his time with the Spirits and Such Consultation Office, is shown to be caring of others' wellbeing, even going as far as keeping himself in his room for the sake of others' safety. Currently, he is 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 gaining friends where he studies.


At the age 12, Serizawa feared his seemingly uncontrollable psychic power to the point that he decidedly kept himself in his bedroom and refused to leave. In fear that he may hurt people by accident, and without the guidance of an adult willing to help control his psychic abilities, he remained a shut-in for 15 years. Toichiro Suzuki finally coaxed him to leave (and by doing so, join Claw) 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 used him to further the aims of Claw, leaving him and his well-being utterly dependent on both Suzuki and his umbrella. Serizawa viewed Claw as a company, Suzuki as the president, and himself as an employee.


World Domination Arc

After hearing Serizawa's past, Mob bluntly told Serizawa that he was being used. When he tried to argue in his own defense, Mob bluntly told him that he was following the wrong person. He made a token attempt to fight Mob, using his umbrella as both a weapon and a shield, but was eventually won over by the sincerity and empathy of Mob's 100% Friendship. By sharing his energy with Serizawa, Mob was also able to share his memories of true friendship with him, which helped Serizawa to understand the true nature of his relationship with Suzuki.

He later used 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 cared about him.

Divine Tree Arc

Serizawa decides to accept Reigen's offer and he start to work at Spirits and Such Consultation Office. At first Reigen decides to cut his hair and shave his beard.

He and Mob exorcize Yokai draw to the Divine Tree.

Telepathy Club Mini-Arc

Reigen invites Serizawa to the New Year's Eve meeting, but he already has plans with friends from school.

???% Arc

When ???% destroys the city, Serizawa and Reigen go check out what is happening. Serizawa is terrified by huge power of Mob, and he retreats.



He takes part and invites Sho to Reigen's birthday party.

Powers & Abilities

When he was a member of Claw, Toichiro Suzuki stated that Serizawa is the most powerful of the Ultimate 5.[2] He is strong enough to block an attack from Suzuki at 3% of his power output[3] as well as to put up a fight against Mob. His psychic aura takes on a purple color with a TV static pattern within.

Serizawa's Abilities
Umbrella Psychokinesis
Serizawa possesses extremely powerful psychokinesis, which he channels through his umbrella to make it a powerful weapon both in melee and ranged combat. He can open it to use it as a shield or close it to use it as a powerful bludgeon. He also demonstrated an unnamed technique where he charged a destructive energy ball at the tip of the umbrella and launched it at the opponent.[4] He used the umbrella as a conduit in order to not lose control of his immense power, though he has recently overcome this issue and doesn't require the umbrella to control himself anymore.


  • (To Mob) "Please... don't make me angry. Do you know how much your words hurt?"[5]
  • "Ability... I can build... plastic models really well. Ah... What else..."
  • "How awesome is that... I talked to the prime minister." [6]


  1. Mob Psycho 100 Manga — Vol. 11 Chapter 89 (page 5). He mentions it was three years since Touichirou found him and he was 27 at the time.
  2. OnePunch-Man Manga; Chapter 81, page 5
  3. OnePunch-Man Manga; Chapter 90, page 50
  4. OnePunch-Man Manga; Chapter 89, page 29-32
  5. OnePunch-Man Manga; Chapter 89
  6. OnePunch-Man Manga; Chapter 89
Mob Psycho 100 Characters
Main Protagonists Shigeo "Mob" KageyamaArataka ReigenDimpleRitsu KageyamaTeruki HanazawaSho Suzuki
Side Characters Salt Middle School

Takane TsubomiTome KurataHaruto KijibayashiMameta InukawaShirihiko SarutaMomozo TakenakaMusashi GodaHideki YamamuraHiroshi KumagawaJun SagawaRyohei ShimuraTenga OnigawaraIchi MezatoEmiShinji KamuroHikaru Tokugawa

Awakening Lab

Kenji MitsuraTakeshi HoshinoGo AsahiRei KurosakiDaichi ShiratoriKaito Shiratori

Other Characters

Banshomaru ShinraKirin JodoMinori AsagiriJosephUdoMiguelFukudaHigashioOtsuki

Claw Boss & Ultimate 5

Toichiro SuzukiKatsuya SerizawaRyo ShimazakiToshiki MinegishiHiroshi ShibataNozomu Hatori

7th Division Scars

IshiguroYusuke SakuraiMegumu KoyamaMurakiMatsuoTeradaTsuchiyaMukaiTakeuchiMutoMiyagawa

Evil Spirits & Entities Keiji MogamiPsycho HelmetThe DraggerWriggle WriggleScent-GhoulBossCeiling Crasher???%