Saiki Kusuo no Sai Nan Wikia
I will protect the world! For I am The Jet-Black Wings!

—Shun on his heroic deeds

Kaidou Shun
Character Name
Full Name Kaidou Shun
Kanji 海藤 瞬
Furigana かいどう しゅん
Personal Info
Age 16 years old
Birthday October 3
Sign ♎ (Libra)
Blood type AB
Gender Male
Height 159 cm
Weight 45 kg
Affiliation Dark Reunion (Formerly)
  • Student
  • Waiter (formerly)
School PK Academy
  • Year 3 Class 1.png (Currently)
  • Year 2 Class 3.png (Formerly)
Novel Debut
Manga Debut Chapter 06
Anime Debut Season 1 Episode 1
English Voice Micah Solusod
Japanese Voice
Live Action Yoshizawa Ryo

Shun Kaidou (海藤 瞬, かいどう しゅん lit. Kaidō Shun) is classified by his classmates as a chuunibyou. Self-proclaimed The Jet-Black Wings (漆黒の翼 lit. Shikkoku no Tsubasa), Shun thinks that the world and its events are overseen and controlled by an Evil Organization called The Dark Reunion.[2] He is an outcast within his class, and likes to show off, but he often becomes cowardly in dangerous situations. When push comes to shove however, he will endanger himself for those he cares about.[3] Shun is one of the main characters of the series. He was played by Yoshizawa Ryo in the live action movie.


Kaidou Shun Full Design.png

When Shun was in middle school, he had the persona of a nerd. He wore his hair down, covering his face with his bangs and wore glasses. However, with the intent of gaining friends, he started planning to change himself when he entered high school. Currently, his hair is spiky and he wears contact lenses. In reference to his chuunibyou, he wears red bandages on both arms to seal away his ‘powers’. He is the shortest boy in his class, standing shorter than most of the girls as well.

At school, he wears the standard male uniform of PK Academy. His shirt has a tattered collar and is torn in other places as well. During his days off, he is shown to dress casually, with his arms always covered by sleeves or bandages.


Shun Split personality.jpg

Shun used to be shy in middle school, and he had no friends at all. Once he began attending PK Academy, he started changing his personality with the plan of becoming adult-like. However, he developed a chuunibyou like personality. He acts confident and conceited at school, lying about being incredibly powerful and talking about how an evil organization called The Dark Reunion is after him and controlling the Earth in hopes that other students will think he's cool. His need for attention is well known to put him in danger on occasion such as when he tried to take credit for leading the rally against Saiko and panicked when Saiko was listening in, another moment was when he told his younger-brother Toki about stories of his power and total control of their neighborhood but panicked when Toki announces it to a nearby thug smashing a vending machine. He often attempts to impress Saiki and the others. However, when feeling hopeless or when around his overbearing mother, he acts like a normal teenager. Despite all of his attempts to impress everyone, he still does not have many friends, aside from his group of associates, and is somewhat a loner at school. He is often full of himself, but when faced with danger he fearfully retreats. He is physically very weak and is terrible at sports and physical activity in general, he also cannot swim, and yet continues to brag about his superhuman abilities that everyone knows he clearly does not have.
Shun has a delusional mind and a wild imagination. He often tries to be cool and strong in front of people, preferably Kusuo, only to end up embarrassing himself more often than not, Shun never learns from these mistakes. He is quick to judge others, as shown when he accuses Riki of being a lolicon after observing him watching a young girl.

In spite of his delusions, Shun is skilled in his academics because of his strict mother making him study to succeed. It was even said that he has high grades in his class, showing that he is not too distracted from his studies.



Shun grew up as a nerd but decided to reinvent himself in high school. In his freshman year at PK Academy, he acquainted himself with Mineo Nobuaki, who taught Shun about chuunibyou. He eventually began to befriend Kusuo as he delusionally thought that Kusuo was special too. Kusuo originally did not want to associate with Shun, however he was left with no other choice after discovering that Shun saw him teleporting near his neighbourhood. It was later revealed that Shun was intent on getting close with Kusuo because he really wanted a friend and saw a fellow outcast as his ally. Shun hadn’t really seen Kusuo’s face when he teleported, but their friendship was already formed.


  • (About Kusuo) "I only wanted…to be friends with Saiki-kun."
  • (To himself) "I won't allow that to happen. I will protect the world! For I am The Jet-Black Wings!"
  • (To Riki) "I misjudged you, Nendou! Don't you dare lay your hands to those frail little girls!"
  • (To Aren) "I don't care about your past. What matters is who you are now and who you'll be in the future!"


  • His name is derived from the Japanese term for Teleportation (瞬間移動,しゅんかんいどう lit. shunkan idō).
  • Aside from his family, Aren is the only one to call him by his first name.
  • His guardian spirit is a chihuahua.[4]
  • His aura is one similar to that of a chipmunk's.[5]
  • His favorite food is salami.[6]
  • His character song is titled "Bloody Moon" which he sang in Episode 18.
  • Sometimes, when he is about to do an act, a part of the song "Judgment Knights of Thunder ~Legendary Hero" plays.
  • His appearance of having light-blue wavy hair and red eyes greatly resembles Sakata Gintoki from Gintama, another series from Weekly Shonen Jump by Hideaki Sorachi.
  • In both the Japanese and English (Funimation dub) versions of the anime, he shares the same voice actors as Yuno from Black Clover, another series from Weekly Shonen Jump by Yuki Tabata.
  • In the two times Shun was scammed by others about Dark Reunion, Kusuo came to his aid, which led to the scammers believing in his paranoia.


  1. Saiki Kusuo no Psi Nan: Chapter 20
  2. Saiki Kusuo no Psi Nan: Chapter 3
  3. TV Tokyo
  4. Saiki Kusuo no Psi Nan: Chapter 18
  5. Saiki Kusuo no Psi Nan: Chapter 163
  6. Shu1aso Twitter October 3, 2017


v · e Kaidou Family
Members: Mother · Kaidou Shun · Kaidou Sora · Kaidou Toki
v · e 2nd Year
Class 1-1.png: Kihachi Bunta · Nishi Soujirou · Sugiyama Haruo · Tanaka Ichirou
Class 2-2.png: Itano Yoriko · Ooshima Yuuji · Oohori Kouichi · Satou Hiroshi · Shinoda Takeru · Nakanishi Shinya · Maeda Takayuki · Suzumiya Hii · Toritsuka Reita
Class 3-3.png: Aiura Mikoto · Akechi Touma · Hairo Kineshi · Kaidou Shun · Kuboyasu Aren · Mera Chisato · Murata Shuuji · Nendou Riki · Saiki Kusuo · Saiko Metori · Sawakita · Takahashi · Teruhashi Kokomi · Yokota Jaga · Yumehara Chiyo · Zolbe Kageyukouji Saberlight
Class 4-4.png: Haruno Akio · Hotei Tomotaka · Tanihara Kenji
Class 5-5.png: Kumi Kouji · Matsuda Ippei · Mikami Aiko · Mishima Nobuaki