Toaru Majutsu no Index Wiki

Kessai Kiyoshi (潔斎 雪紫?)[2] is a student of Tokiwadai Middle School who appears in Toaru Kagaku no Railgun.[1] She is the former roommate of Misaka Mikoto and member of the Hasekura Clique, one year before the main story.[3]


Kessai has dark-colored hair, with an exposed forehead and prominent eyebrows. She wears the Tokiwadai Middle School uniform.[1][3]


Kessai seems to get along with Mikoto (addressing her as 'Mikoto-chan'), though she is secretly monitoring her for the Hasekura Clique.[1][3]


Kessai joined Tokiwadai Middle School in the same year as Misaka Mikoto, one year before the present, and became a member of the Hasekura Clique. Being assigned to the same room at Mikoto, she was tasked by the clique with monitoring the Level 5.[1][3]

In early May, following a swimming class, she explained the circumstances surrounding Shin'enkouji Rurikakesu and Tokiwadai's three main cliques to Mikoto after mentioned her earlier encounter with the former. Leaving for her club, she accidentally left behind an accessory, which Mikoto noticed after she had left,[1] and in trying to contact her to return it during the day, encountered the three clique leaders and a few others.[1][3] Kessai had a phone conversation with other clique members regarding Mikoto, before receiving her accessory back in the evening, when both had returned to their room.[3]

At some point after the switch to summer uniforms, Kessai witnessed an argument between Mikoto and Shokuhou Misaki. After listening to Mikoto describing her first encounter with the other Level 5 and thinking about the circumstances while they walked down a street, the pair encountered Ruri who accompanied them to Vending Machine 7116.[2]


Toaru Kagaku no Railgun[]

Jailbreaker Arc[]

Main article: Jailbreaker Arc

Mikoto's flashback to her time with Ruri and Kessai

Some time after her battle with Shundan Kimi, a hospitalized Misaka Mikoto briefly thought back to her time with Ruri and Kessai while observing the interactions of her similarly hospitalized friends.[4]

Kessai herself has yet to appear in the present day.


Her esper ability is currently unknown, but as a student of Tokiwadai Middle School, it can be presumed to be at Level 3 or 4.



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Tokiwadai Middle School
Misaka.png Shirai Kuroko Winter Clothing (Anime).png Kongou Mitsuko in Winter Clothing (Anime).png Shokuhou Misaki in Winter Clothing (Anime).png
Misaka Mikoto Shirai Kuroko Kongou Mitsuko Shokuhou Misaki
Awatsuki Maaya RailgunT (Anime).png Wannai Kinuho RailgunT (Anime).png Kirifu Megumi (Anime).png Kobayashi Satori (Anime).png
Awatsuki Maaya Wannai Kinuho Kirifu Megumi Kobayashi Satori
Hokaze Junko Winter Clothing (Anime).png Template Placeholder other.png Yumiya Iruka Color (Astral Buddy).png Makigami Komaki (Astral Buddy).png
Hokaze Junko Usukinu Yasumi Yumiya Iruka Makigami Komaki
Maybe Natsumi.png Sakibasu Yuri (Navbox).jpg Houjou Arei (Astral Buddy).png Kessai Kiyoshi.png
Natsumi Sakibasu Yuri Houjou Arei Kessai Kiyoshi
Shinenkouji Rurikakesu.png Sha Tanshan.png Mikagami Nagisa.png Hasekura Reiri.png
Shin'enkouji Rurikakesu Sha Danshan Mikagami Nagisa Hasekura Reiri
Kazan'in.png Template Placeholder other.png Template Placeholder other.png Enjou.png
Kazan'in Andou Inori Enjou
Gaouin Tsukasa.png Kakuzume.png Lily.png
Gaouin Tsukasa Kakuzume Lily
Ryoukan.png Watanabe (Anime).png
Tokiwadai Dorm Supervisor Watanabe