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Kikuoka Seijirou

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Warning Spoiler Alert: This article/section contains details about future plotlines described in the light novels, not covered in the anime. Do not proceed unless you want to be spoiled.
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Kikuoka Seijirou (菊岡誠二郎, Kikuoka Seijirō?), known as Chrysheight (クリスハイト, Kurisuhaito?) in «ALfheim Online» (ALO), is a supporting character in the Phantom Bullet Arc and Alicization Arc, as well as a reoccurring character throughout the Sword Art Online series. He allegedly works for the Ministry of Internal Affair's Telecommunications Bureau, Advanced Network Division, Second Office (the «Virtual Division»)[3] and, at some point after the end of the Sword Art Online incident, began playing ALfheim Online for research purposes. However, Seijirou is actually a Lieutenant Colonel of the Japan Ground Self Defense Force, who voluntarily transferred over to the Ministry of Internal Affair's Telecommunications Bureau for the sake of his plans on Project Alicization.[4]


Kikouka Seijirou was an investigator in the «Sword Art Online Case Victims Rescue Force», and the one who told Kazuto which hospital Asuna was in.[3][5] Though he is stated to be part of the virtual division, Kazuto suspects he is part of the JSDF after tailing him. He takes advantage of Kazuto's gratitude by using him as an investigator for issues, and uses other people like watchdogs over the VR network.

Seijirou was also one of the original 1,000 beta testers for the original Sword Art Online. However he did not transfer over to the full version of Sword Art Online because he realized that the technology could be used for more than just military training programs and started working on Project Alicization.[4]


Extra EditionEdit


Seijirou had the SAO Survivor School set up an emergency counseling session with Kazuto, to his surprise, in order to gather more information regarding the events of SAO, and its aftermath. The game's logs only displayed the locations of players at certain times and, with Kayaba Akihiko's death, Seijirou wanted to hear Kazuto's story. Kazuto, after informing Seijirou that he had to be somewhere later, agreed to tell him everything that happened: from the incidents in SAO, to Kirito's "victory" over Heathcliff, and then explained the situation after he discovered that Asuna, along with 300 other SAO players, was trapped by Sugou Nobuyuki, and how he came to locate her in ALfheim Online.

Seijirou was later seen calling Kazuto through his cellphone.

Phantom Bullet ArcEdit

Kikuoka Seijirou made his first appearance at the beginning of the Phantom Bullet arc as an acquaintance of Kazuto, contacting him for advice concerning a troubling matter. He introduced the Death Gun problem, trying to debate on how Death Gun could kill through the tamper-proof, safety-conscious AmuSphere. He and Kazuto reasoned that such a feat was impossible, but he convinced Kazuto to investigate for a sizable reward.

After Kirito entered the «Bullet of Bullets» and encountered Death Gun after the death of Pale Rider, Asuna contacted Seijirou and got him to log in to ALfheim Online where she interrogated him to find out the true reason behind Kazuto converting his avatar to Gun Gale Online. He, after extreme pressure, revealed everything to Asuna.

In the resolution, he met with Kazuto and Asada Shino for a debriefing of the incident and apologized for the danger. Kazuto also brought up the issue of the dangers that some aspects of VRMMO games pose, such as invisibility being a gateway to misbehavior.

Alicization ArcEdit

Alicization RunningEdit

It was revealed that he was a Lieutenant Colonel from the Japanese government's Self-Defence Force, and was in charge of Project Alicization. He oversaw its conception and formulation, directing the soul cloning of newborn babies and then the acceleration of the Underworld society.

It was also revealed that he had taken advantage of the «Gun Gale Online Incident» to form a relationship with Kazuto. His true goal was revealed to have been enlisting Kazuto's help for Project Alicization.

Alicization Uniting Edit

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Alicization Invading Edit

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Alicization Exploding Edit

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See Kikuoka Seijirou/Image Gallery


  • Seijirou is a man who likes talking about disgusting things. For example, he excitedly talked about the making of a Kiviak in great detail in a cafe.[3]
  • Seijirou's character name, Chrysheight, which is formed from the English words «Chrysanthemum» and «Height»[6], comes from Seijirou's family name, Kikuoka (菊岡?), which is written using two kanji: Chrysanthemum (, Kiku?) and height (, oka?).[7]
  • Chrysheight's skill as a mage in ALfheim Online is acknowledged by General Eugene.
  • In the web novel version, all of Seijirou's family members died when he was a baby in the 1980s due to an air traffic incident. According to Kirito's memory, one of the proposed causes for the incident was a fighter misfiring a missile.



Major Characters
Alice Schuberg - Asada Shino (Sinon) - Ayano Keiko (Silica) - Eugeo - Kayaba Akihiko - Kikuoka Seijirou - Kirigaya Kazuto (Kirito) - Kirigaya Suguha (Leafa) - Shinozaki Rika (Lisbeth) - Tsuboi Ryoutarou (Klein) - Yui - Yuuki Asuna (Asuna)
SAO Players
Aincrad Liberation Force/ALS Joe - Kibaou - Kobatz - Thinker - Yulier
Divine Dragon Alliance/DKB Lind - Schmitt - Shivata - Yamata
Fuumaningun Isuke - Kotaru
Fuurinkazan Dale - Dynamm - Harry One - Issin - Klein - Kunimttz
Golden Apple Caynz - Grimlock - Griselda - Schmitt - Yolko
Knights of the Blood Asuna - Daizen - Godfree - Heathcliff - Kirito - Kuradeel
Laughing Coffin Johnny Black - Kuradeel - PoH - XaXa
Legend Braves Beowulf - Cu Chulainn - Enkidu - Gilgamesh - Nezha - Orlando
Moonlit Black Cats Ducker - Keita - Kirito - Sachi - Sasamaru - Tetsuo
Titan's Hand Rosalia
Others Agil - Argo - Ashley - Coper - Diavel - Lisbeth - Lux - Morte - Nishida - Rossa - Ryufior - Sasha - Silica
Beta-Tester Argo - Coper - Diavel - Morte - Kirito
NPC Angel - Kizmel - NPC Orchestra - Pina - Ruru - Tilnel - Yui
Non-Canon Aaaa - Leafa - Philia - Rain - Sinon - Strea - Yuuki
ALO Players
Cait Sith Alicia Rue - Silica - Sinon
Gnome Agil - Tecchi
Imp Yuuki
Leprechaun Lisbeth - Talken
Pooka Sasha
Salamander Eugene - fastuosa - Gtacs - Jun - Kagemune - Klein - Mortimer - UxperXJ
Spriggan Kirito - Kuro - Nori
Sylph Erika - Leafa - Recon - Sakuya - Sigurd
Undine Asuna - Chrysheight - Siune - Thinker - Yulier
NPC/Navigation Pixie Angel - Leviathan - Nerakk - NPC Orchestra - Pina - Skuld - Thrym - Thor - Tonky - Urðr - Verðandi - Yui
Others Ashley - Fairy King Oberon - Marinca - Saitou Shouichi
Non-Canon Argo - Philia - Rain - Seven - Strea - Sumeragi
GGO Players
Dyne's Squadron Arashi - Dyne - Ginrou - Jin - Miso - Sinon
BoB Participants Blackwood - Colonel Liberty - DA*LU - Dyne - E.J. - Fernil - Garrett - huuka - Jack Reacher - JIGEN - Kakouton - kaeeeede - Kakameposu the II - Keith - Kirito - Lion King Richie - Masaya - Musketeer X - No-No - Pale Rider - Pancho - Raiden - Licoco - Setsugekka - Shishigane - Sinon - Sterben - Stinger - Subtilizer - Ten-Q - Uemaru - Yamikaze - XeXeeD - XYZ
Death Gun Victims Garrett - Pale Rider - Usujio Tarako - XeXeeD
Squad Jam Participants LLENN - Miyu - Pitohui
Others Behemoth - Spiegel
Underworld Resident
Human Empire Rulid Village Alice Schuberg - Bercouli - Doyke - Eugeo - Garitta - Gasupht Schuberg - Jink - Kirito - Nigel Balbossa - Orick - Sadina Schuberg - Selka Schuberg - Sister Azariya
Zakkaria Banou Wolde - Egome Zakkalight - Kelgam Zakkalight - Telin Wolde - Telulu Wolde - Toriza Wolde
Centoria Azurika - Cardinal - Quinella - Sadore
Sword Mastery Academy Azurika - Eugeo - Frenica Szeski - Gorgolosso Baltoh - Humbert Zizek - Kirito - Raios Antinous - Ronye Arabel - Sortiliena Serlut - Tiese Shtolienen - Uolo Levanteinn - Zobun
Central Cathedral Cardinal - Charlotte - Chudelkin - Elevating Operator - Fizel - Linel - Quinella
Integrity Knight Alice Schuberg - Bercouli - Dakira - Deusolbert - Eldrie Woolsburg - Eugeo - Fanatio - Fizel - Giro - Hobren - Jeis - Linel
Dark Territory Black Iums D.I.L - Fu Za - Iskahn - Shasta
Orcs Rilpirin
Giants Sigrosig
Goblins Oroi - Ugachi
Underworld Visitors
Agil - Alicia Rue - Asuna - Eugene - Gabriel Miller - Hirono Takashi - Jun - Kirito - Klein - Leafa - Lisbeth - Nori - Sakuya - Silica - Sinon - Siune - Tecchi - Vassago
Reality/Other Games
Rath Aki Natsuki - Higa Takeru - Kikuoka Seijirou - Koujiro Rinko - Nakanishi
Others Cel - Clovis - Critter - Doctor Kurahashi - Endou - Kirigaya Midori - Konno Aiko - Merida - Sada Akiyo - Yuuki Kouichirou - Yuuki Kyouko - Yuuki Shouzou

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