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Professor Koujiro Rinko (神代 凛子, Koujiro Rinko?) is a supporting character in the Alicization Arc. She is a scientist, as well as the former love interest and co-worker of Kayaba Akihiko. She studied at the Toto Institute of Technology in Japan, where she was a part of Shigemura Lab in the institute's Electrical and Electronic Engineering Department.[3]

Appearance

Koujiro Rinko Full Body

Koujiro Rinko is a petite young woman with short, straight, black hair.[4]

Personality

Koujiro Rinko is a loyal and caring person, having taken care of Kayaba Akihiko's condition during his two-year dive into Sword Art Online and never left his side as she had feelings for him.

Background

Koujiro Rinko met Kayaba Akihiko in her first year of college at the age of eighteen, when she invited her senior to go swimming. Akihiko was nineteen years of age at the time and a second year.[3]

Soon afterwards, Koujiro Rinko began working on the SAO project, unaware of Akihiko's mastermind plan. Ten years later, the first VRMMORPG, Sword Art Online, was released.

Chronology

Aincrad Arc

Rinko initially helped in the development of SAO. When the SAO incident occurred, she was the only person who guessed where Akihiko was. Without telling anyone and avoiding the police, she decided to confront Akihiko in his hidden mountain cottage with the intent to kill him, but she was not able to do so and instead helped maintain Akihiko's physical condition, when he dived into the game for long periods of time. After the incident, the police found the cottage where both of them stayed. While Akihiko had already died after digitizing his brain to the network permanently, Rinko was arrested by the police and awaited her trial.

Fairy Dance Arc

Before the SAO incident ended, a fake long-distance micro bomb was implanted to the left of Rinko's sternum by Akihiko to make the world think that she was forced to help him during the incident. According to Rinko, that was the only gift that Akihiko had given her.[5]

In March 2025, after Rinko was released on bail and later acquitted, she was contacted by Kirigaya Kazuto via email, asking to talk with her. A week later, Rinko visited Kazuto's house, where they decided to go to a coffee shop near a Tokyo station to talk.

Alicization Arc

Alicization Running

Two years after the SAO incident, Rinko had apparently moved to San Francisco, California. She had been invited by Kikuoka Seijirou to participate in top secret research on FullDive technology, but had been reluctant to accept the offer. But on July 1, 2026, she received an unexpected, long email from Yuuki Asuna. Learning about Asuna's situation, Rinko agreed to help the girl find Kazuto, thus she contacted Seijirou about accepting the invitation. Four days later on July 5, Rinko and Asuna, the latter disguised as Rinko's assistant Mayumi Reynolds, traveled to the hidden base of Rath, the «Ocean Turtle». There, they witnessed Rath's research on the «Soul Translator» and learned the reason why Kazuto was secretly transported to this facility.

Alicization Turning

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Alicization Dividing

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Alicization Invading

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Alicization Exploding

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Gallery

See Koujiro Rinko/Image Gallery

References

  1. She says that she was 18 years old 10 years before the events of Volume 10, Chapter 2, Part 2.
  2. Alicization War of Underworld Episode 2 (Alicization Episode 26) English dub credits
  3. 3.0 3.1 Volume 10, Chapter 2, Part 2
  4. Volume 10, page 002-003 coloured illustration.
  5. Volume 10, Chapter 2, Part 3

Navigation

Characters
Major Characters
Alice Zuberg - 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 Hokkaiikura - Joe - Kibaou - Kobatz - Liten - Melonmask - Okotan - Schinkenspeck - Thinker - Yulier - Yakumo
Divine Dragon Alliance/DKB Buxum - Hafner - Lind - Morte - 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 - Nautilus
Laughing Coffin Johnny Black - Kuradeel - Kuro - PoH - XaXa
Legend Braves Beowulf - Cu Chulainn - Enkidu - Gilgamesh - Nezha - Orlando
Moonlit Black Cats Ducker - Keita - Kirito - Sachi - Sasamaru - Tetsuo
Titan's Hand Rosalia
Two-Handed Builders Agil - Lowbacca - Naijan - Wolfgang
Others Argo - Ashley - Ceba - Coper - Diavel - Gin - Gwen - Kein - Lisbeth - Lux - Mina - Mito - Nishida - Rossa - Ryufior - Sasha - Silica - Yuna
Beta Testers Argo - Coper - Diavel - Isuke - Kirito - Kotaru - Mito - Morte
NPC Angel - Kizmel - Leyshren Zed Yofilis - Lion - Myia - NPC Orchestra - Pina - Ruru - Scarecrow - Theano - Tilnel - Tin - Toto - Yui
Non-Canon Aaaa - Ado - Alberich - Alice Zuberg - Ceniza - Clumy - Cocoa - D.I.L - Eugeo - Fer - Fuego - Garcia - Idhrendis - Knakia - Koharu - Lapis - Leafa - Leuer - Linhua - Mariah - Mater - Mikiha - Miyurin - Notte - Oculus - Philia - Protagonist (Integral Factor) - Rain - Rano - Sanya - Seeda - Sinon - Stilla - Strea - Typhon - Ulrik - Vela - Vecta - Wendelin - Yuuki
ALO Players
Cait Sith Adie - Alicia Rue - Silica - Sinon
Gnome Agil - Tecchi
Imp Yuuki
Leprechaun Ceba - Granze - Lisbeth - Talken
Pooka Sasha
Salamander Eugene - fastuosa - Gtacs - Jun - Kagemune - Klein - Mortimer - UxperXJ
Spriggan Kirito - Kuro - Nori
Sylph Erika - Fukaziroh - Leafa - Lux - Recon - Sakuya - Sigurd
Undine Asuna - Chrysheight - Siune - Thinker - Yulier
NPC/Navigation Pixie Angel - Emely - Hraesvelg - Leviathan - Nerakk - NPC Orchestra - Pina - Skuld - Thiazi - Thor - Thrym - Tonky - Urðr - Verðandi - Yui
Others/Unknown Ashley - Fairy King Oberon - Garnet - Gwen - Marinca - Saitou Shouichi - Slug Researchers
Non-Canon Alice Zuberg - Argo - Black Lotus - Eugeo - Heathcliff - Persona Vabel - Philia - Rain - Sachi - Seven - Strea - Sumeragi - Yuna
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 - Usujio Tarako - Yamikaze - XeXeeD - XYZ
Death Gun Victims Garrett - Pale Rider - Usujio Tarako - XeXeeD
Squad Jam Participants KKHC Shirley
LPFM Fukaziroh - LLENN - M - Pitohui
MMTM Bold - David - Jake - Kenta - Lax - Summon
Narrow Dashin - Hidehide - Nagama - Nobu - Saika - Yasu
SHINC Anna - Eva - Rosa - Sophie - Tanya - Tohma
ZAT Benjamin - Casa - Frost - Koenig - Yamada - Let's Play Host
ZEMAL Heuy - Max - Peter - Shinohara - Tomtom
Others Clarence
Other main series characters Behemoth - Spiegel
AGGO manga original characters Batian - Boss - Costa - Lorosae - Panama - Rio
Non-Canon Afasys - Agil - Alice Zuberg - Argo - Asuna - Bazalt Joe - Daisy - Eiji - Eugeo - Itsuki - Klein - Kureha - Leafa - Lievre - Lisbeth - Philia - Premiere - Protagonist (Fatal Bullet) - Rain - Sachi - Seven - Silica - Strea - Yui - YUNA - Yuuki - Zeliska
Underworld Resident
Human Empire Rulid Village Algu - Alice Zuberg - Bercouli - Donetti - Doyke - Eugeo - Garitta - Gasupht Zuberg - Ivenda - Jaina - Jink - Kirito - Nigel Balbossa - Orick - Ridack - Sadina Zuberg - Selka Zuberg - Sister Azalia - Sulinea
Zakkaria Banou Wolde - Egome Zakkarite - Kelgam Zakkarite - Telin Wolde - Telulu Wolde - Toriza Wolde
Centoria Azurica - Cardinal - Quinella - Sadore - Yazen
Sword Mastery Academy Azurica - Eugeo - Frenica Szeski - Golgorosso Balto - Humbert Zizek - Kirito - Raios Antinous - Ronye Arabel - Sortiliena Serlut - Tiese Shtolienen - Volo Levantein - Zobun
Central Cathedral Ayuha Furia - Berche - Cardinal - Charlotte - Chudelkin - Elevating Operator - Fizel - Hainag - Hana - Linel - Quinella - Soness Furia - Xiao Choucas
Integrity Knight Alice Zuberg - Bercouli - Dakira - Deusolbert - Eldrie Woolsburg - Entokia - Eugeo - Fanatio - Fizel - Giro - Hobren - Jeis - Linel - Nergius - Renly - Scheta
Dragons Amayori - Himawari - Hinageshi - Hoshigami - Kazenui - Shimosaki - Takiguri - Tsukigake - Yoiyobi
Others Alderes Wesdarath V - Almera Woolsburg - Cruiga Norlangarth VI - Eolyne Herlentz - Eschdol Woolsburg - Hozaika Eastavarieth - Zeppos
Dark Territory Black Iums D.I.L - Dampe - Fu Za - Iskahn - K.U.V - Leazetta - Lengil Gira Scobo - Lipia Zancale - Vixur Ul Shasta - Yotte
Orcs Moricca - Renju - Rilpirin
Ogres Furgr
Giants Sigurosig
Goblins Aburi - Hagashi - Kosogi - Kubiri - Oroi - Shibori - Ugachi
Non-Canon Aleo - Cardo - Carver - Dorothy Isaiah Elisheva - Edith - Elcar Marscull - Fazahd - Hektor Ul Günther - Hersyrian - Jared - Kainan - Kayode Norlangarth - Kirimai - Lushe - Mary - Medieta - Medina Orthinanos - Momento - Paulie Aurimas - Phinea Suvale - Proxy - Rogu - Round Robin - Sarai - Shirley - Somelier - Sylvie - Tolgash Southacroith III - Vallenthor - Wegin Sorby - Zacza - Zappas - Ziczi
Underworld Visitors
Agil - Alicia Rue - Asuna - Eiji - Eugene - Gabriel Miller - Hirono Takashi - Jun - Kirito - Klein - Leafa - Lisbeth - Moonphase - Nori - Sakuya - Silica - Sinon - Siune - Tecchi - Vassago - YUNA
Non-Canon Argo - Ceba - Itsuki - Kureha - Mito - Philia - Premiere - Rain - ReoNa - Seven - Strea - Tia - Yui - Yuuki - Zeliska
Asuka Empire
Players Clevel - Koyomi - Merida - Nayuta - Ran - Yanagi - Yuuki
NPC Clovis (AI)
Staff Torao
Reality/Other Games
Rath Aki Natsuki - Higa Takeru - Hiraki - Ichiemom - Kikuoka Seijirou - Koujiro Rinko - Nakanishi - Niemom - Yanai
Others Alicia Klingerman - Cel - Clovis - Critter - Doctor Kurahashi - Eiji - Endou - Fujita Shin - Kirigaya Midori - Kirigaya Minetaka - Okano Kouji - Oosawa Mizue - Oosawa Sachie - Sada Akiyo - Satou Rei - Shigemura Tetsuhiro - Yuna - Yuuki Kouichirou - Yuuki Kyouko - Yuuki Shouzou
Non-Canon Es - Gattas - Genesis - Goliath - Kaede - Laraiah - Layla - Michael - PoH (Variant Showdown) - Premiere - Richter - Sigil - Teria - Tia
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