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Iori Mashiro (亥織真白 Iori Mashiro?) is a student of Tokiwadai Middle School who appears in Toaru Kagaku no Mental Out. She is a clique leader and one of the candidates for Tokiwadai's Student Council Election.


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Personal features[1]

Iori has pink hair, styled into ringlet curls at the back.[1][2] Being a Tokiwadai student, she wears the school's uniform.[1]


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Chapter 7/8[1][3]

Iori greatly dislikes Shokuhou Misaki, resenting her growth in body and clique.[1][3] She is prone to impatience and somewhat belligerent, being in favour of a prompt, violent approach at the candidate meeting,[1][3] though she is not partial to excessive injury and bloodshed.[4] Like most of the other election candidates, Iori was not willing to give up on her bid for student council presidency and support another's bid for the sake of stopping another one of her rivals.[1] She has described herself as someone who hates losing.[5]


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Chapter 7[1]

Iori's background is mostly unknown, but she was established as a clique leader by the time of the student council presidential election.[6][1] Her comments indicate that she was in that position when Shokuhou was still small and had just started her clique, and gained enmity for her as both she and her clique grew large.[1]


Toaru Kagaku no Mental Out[]

Tokiwadai Election Arc[]

Main article: Tokiwadai Election Arc
This section requires expansion
Possible further expansion[1][3][4][7]

Iori attended the meeting Kamino held with the other election candidates (with the exception of Inubushi, who ignored Kamino's invitation) about potential cooperation and courses of actions in response to their two main rivals in the competition joining forces,[1] as Shokuhou Misaki and Gaouin Tsukasa were working together to find evidence that would exonerate Hokaze Junko.[8]

She participated in the joint attack the candidates launched against Shokuhou and Gaouin, first remotely directing Tatsuki Mirei's attacks on the pair after Kamino had sealed off space and trapped them. With the initial attacks missing, she became impatient and contacted Tatsuki to change up their plan, bringing the water balls into action. Shortly afterwards, she observed a break in camera footage and considered the possibility of a third party acting.[3]

She was subsequently proved right when Mei and Kii rescued Shokuhou from being drowned by one of the larger water balls. Focusing her attacks on the duo, Iori was eventually able to collapse the floor below them and seal it after they fell to end their invention.[9] Immediately afterwards, she became mad and panicked when Tatsuki took the chance to attack Shokuhou and bloodily injured Gaouin's arm,[9][4] contacting her to tell her off for acting on her own and causing more harm than they had planned, but was disregarded.[4] She was further dismayed when Shokuhou managed to interfere with her water balls, when Tatsuki was revealed and mentioned her name in conversation as well, and when she violently resumed her attacks.[4]


Iori's ability allows her to remotely control water balls (sometimes referred to as slimes, gel or jelly by others), both many small ones and one larger one.[3][9][4] The water balls are 0.9% saline, something speculated by Shokuhou Misaki to be a necessary part of her power.[4] As a student of Tokiwadai Middle School, her ability can be presumed to be at Level 3 or 4.



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Tokiwadai Middle School
Students (Current Year)
Misaka Shirai Kuroko Winter Clothing (Anime) Shokuhou Misaki in Winter Clothing (Anime) Hokaze Junko Winter Clothing (Anime) Kongou Mitsuko in Winter Clothing (Anime)
Misaka Mikoto[1] Shirai Kuroko Shokuhou Misaki[1] Hokaze Junko[1] Kongou Mitsuko
Awatsuki Maaya RailgunT (Anime) Wannai Kinuho RailgunT (Anime) Kirifu Megumi (Anime) Kobayashi Satori (Anime) Yumiya Iruka Color (Astral Buddy)
Awatsuki Maaya Wannai Kinuho Kirifu Megumi[1] Kobayashi Satori[1] Yumiya Iruka
Houjou Arei (Astral Buddy) Makigami Komaki (Astral Buddy) Maybe Natsumi Sakibasu Yuri (Navbox) Gaouin Tsukasa
Houjou Arei Makigami Komaki Natsumi Sakibasu Yuri Gaouin Tsukasa
Kamino Kokuchou Mayui Iori Mashiro Tatsuki Mirei Kumamori Tazuna
Kamino Kokuchou Mayui Iori Mashiro Tatsuki Mirei Kumamori Tazuna
Inubushi Glasses Judgment Girl - Commissioner (Mental Out) Mei (Anime) Kii (Anime) Resanerié Sadis Dialine
Inubushi Glasses Judgment Girl Mei Kii Resanerié Sadis Dialine[1]
Asato Kisa (Anime) Mibuki Kazan (Anime) Spy in Shokuhou Clique Otonari Hibiku
Asato Kisa[1] Mibuki Kazan[1] Nenohi Wakana Otonari Hibiku
AndouIkushimaInoriKinoshita HagoromoMatsuzai ShoukoSenbayashi KonomiTanaka MizuhoUmibe RyoukoUsukinu YasumiYonaki ReikaYamashiroYanagisakiin RondoYugure Kanaria
[1]: Student who is also present in Tokiwadai 1 year ago.
Students (1 Year Ago)
Kessai Kiyoshi (Navbox) Shinenkouji Rurikakesu Sha Tanshan Mikagami Nagisa Hasekura Reiri
Kessai Kiyoshi[C] Shin'enkouji Rurikakesu[G] Sha Danshan[C] Mikagami Nagisa[G] Hasekura Reiri[G]
Lily Ouyang Qian Lin Lihua Urui Aika Kazanin Tsukasa
Wu Lili Ouyang Qian Lin Lihua Urui Aika[G] Kazan'in Tsukasa[G]
Asakura Olivia Moa Kadosaka Rina Sukezawa Sena Enjou Kasumi Yasutoba Suika
Asakura Olivia Moa[G] Kadosaka Rina Sukezawa Sena Enjou Kasumi Yasutoba Suika[G]
Amano Ayane Unnamed Hasekura Clique Member 1 (Railgun Ch139) Unnamed Hasekura Clique Member 2 (Railgun Ch138) Unnamed Hasekura Clique Member 3 (Railgun Ch138) Ibotanokikouji Kaede
Amano Ayane[G] Satsuki Mahiru Soyogo Kato Asuwara Yui Ibotanokikouji Kaede[D][F]
For the unnamed clique members, see respective pages: Sha Clique, Mikagami Clique, and Hasekura Clique.
[C]: Student who is present in current year. / [D]: Deceased / [F]: Former student who haven't graduated but left school / [G]: Graduated
Students (2 Years Ago and Earlier)
Takebayashi Yayoi
Takebayashi Yayoi[D][F]
[D]: Deceased / [F]: Former student who haven't graduated but left school
Unabara (Mental Out Ch20, 6D+6F) Ryoukan Watanabe (Anime)
Director Unabara
Tokiwadai Dorm Supervisor Watanabe
v  e
Tokiwadai Election Candidates
Shokuhou Misaki (Mental Out) Gaouin Tsukasa Kamino Kokuchou Mayui
Shokuhou Misaki Gaouin Tsukasa Kamino Kokuchou Mayui
Iori Mashiro Inubushi Kumamori Tazuna Tatsuki Mirei
Iori Mashiro Inubushi Kumamori Tazuna Tatsuki Mirei