Armed Detective Agency
- Marie Zusak [Markus Zusak], Ability: 'The Book Thief'
- Yuno Ota [Yoko Ota], Ability: 'Half-Human'
Port Mafia
Firefly Assembly - A minor elite unit consisting of ability users, led by Executive Enchi.
- Varjak [S.F. Said], Ability: 'Varjak Paw'
- Whitaker Wordsworth [William Wordsworth], Ability: 'I Wandered Lonely As a Cloud'
- Ino Nitobe [Inazo Nitobe], Ability: 'Bushido'
- Fuuka Enchi [Fumiko Enchi], Ability: 'Masks'
- Harlow Lee [Harper Lee], Ability: 'To Kill a Mockingbird'
Rats in The House of The Dead
- Uryuu Akinari [Ueda Akinari], Ability: 'Tales of Moonlight and Rain'
The Blood Moon Society - An organisation which leads the 'Black Market' and aims to find The Book in order to turn everyone in the world into an ability user.
- Alberich Carter [Angela Carter], Ability: 'The Bloody Chamber'
- Bowie Crouch [Blake Crouch], Ability: 'Dark Matter'
- Evelyn Dickinson [Emily Dickinson], Ability: 'Hope is The Thing with Feathers'
- Yuya Mishima [Yukio Mishima], Ability: 'The Temple of The Golden Pavilion'
The Hangman Company - A small group of ability users who aim to create a drug that enhances a person's ability beyond their usual capabilities, intending to sell the drug for money.
- Yoshika Buson [Yosa Buson], Ability: 'They End Their Flight'
- Poppy Sykes [Pamela Sykes], Ability: 'Come Back, Poppy'
- Atlas Huxley [Aldous Huxley], Ability: 'Doors of Perception'
- Isadore Asimov [Isaac Asimov], Ability: 'Foundation'
Women's League of International Political Dispute - A group of women who act as bounty hunters and assassins on a political level, who also engage in information collecting and work internationally.
- Kanami Ishiguro [Kazuo Ishiguro], Ability: 'Nocturnes'
- Gaia Orwell [George Orwell], Ability: 'Nineteen Eighty-Four'
- Richochet Brabury [Ray Bradbury], Ability: 'Fahrenheit 451'
- June Slocum [Joshua Slocum], Ability: 'Sailing Alone Around the World'
- Yuzu Tsutsui [Yasutaka Tsutsui], Ability: 'The Girl who Leapt Through Time'
- Hachiro Arikawa [Hiro Arikawa], Ability: 'Travelling Cat Chronicles' (Secretary)
Not aligned with any organisation or group.
- Fuyuki [Kenzaburou Oue], Ability: 'Somersalt'
- Haruhi Murakami [Haruki Murakami], Ability: 'Kafka on The Shore'
- Reve Barthes [Roland Barthes], Ability: 'The Death of The Author'
- Sadako Shōnagon [Sei Shōnagon], Ability: 'The Pillow Book'
- Mamoru Kaneko [Mitsuharu Kaneko], Ability: 'Demons and a Poet'