AI: The Somnium Files Wiki
AI: The Somnium Files Wiki

Pewter: "Everything the Boss did, she did for you. You should ask her about it."
Date: "..."
Pewter: "She truly cares about you, you know. That’s why she kept silent about what happened six years ago."
Pewter speaking to Date about Boss

Boss (ボス, Bosu) is a main character featured in AI: The Somnium Files and the Lemniscate YouTube series.

As her name implies, she is the commander of Tokyo Metropolitan Police Department's Advanced Brain Investigation Squad (ABIS). Boss is Kaname Date’s direct superior and long-time friend. She appears to be an easygoing optimist with a carefree attitude, but she is as cunning as a fox with a quick wit.


Boss has messy dark-brown hair that she ties back in a ponytail. She has thick brown eyebrows and brown eyes. She seems to usually wear minimal make-up, though she is known on occasion to wear red lipstick. Boss wears a red leather jacket over a dark grey and black hooded dress. She leaves the zipper for her dress undone most of the way, and her jacket open, a nod to the informal atmosphere she tries hard to maintain. Boss wears black gloves and black crew socks under red leather boots. Her resting face is largely neutral, but her narrowed eyes and pouted lips give the impression of an inquisitive person.


Boss is impulsive, confident, and level-headed. This makes her great at interrogations because she never fails to ask the hard questions. She takes her work seriously, but tries her best to construct a relaxed work environment, as is evidenced by the way she decorates her office, and her treatment of her colleagues. Boss is not above joking around, often making Pewter or Kaname Date the butt of her jokes. This often takes the form of playful teasing, or sexual innuendo. She is rebellious, not hesitating to go behind HQ's back when it is required. Boss is fiercely independent, but also fiercely loyal and protective. She will do whatever it takes to keep her friends safe and healthy, even resorting to illegal means, such as blackmail, in dire circumstances.


Shizue Kuranushi (暮主 静枝, Kuranushi Shizue), nicknamed Boss (ボス, Bosu), is a character featured in AI: The Somnium Files and the Lemniscate YouTube series.

As her name implies, she is the commander of Tokyo Metropolitan Police Department's Advanced Brain Investigation Squad (ABIS). Boss is Kaname Date’s direct superior and long-time friend. She appears to be an easygoing optimist with a carefree attitude, but she is as cunning as a fox with a quick wit.

Early Life and Police[]


Cyclops Serial Killings[]


Advanced Brain Investigation Squad[]

Boss is the commander of the Tokyo Metropolitan Police Department's Advanced Brain Investigation Squad (ABIS). The majority of the appearances she has take place in her office there.

Murder of Shoko Nadami[]

Boss is one of the first characters introduced to the player in the game, as she appears in the first scene at Bloom Park at the scene of the murder of Shoko Nadami. Her dialogue is mostly brief, with the quick mention of the Original Cyclops Serial Killings, which she ignores Kaname Date's questions about. She is shown holding an umbrella to keep herself clear of the rain.

A: New Cyclops Serial Killings[]


B: Disappearance of Renju Okiura[]



AI: The Somnium Files
Day 1: sigAI Day 2: saikAI Day 2: meikAI Day 3: syokubAI Day 3: rihAI
Appears Appears Appears Appears Appears
Day 4: youdAI Day 4: jikAI Day 5: zugAI Day 5: syokuzAI Day 4: syougAI
Appears Appears Appears Body Only Appears
Day 5: seisAI Day 6: hiAI Day 6: sanpAI Day 3: gumAI Day 4: jukkAI
Appears Appears Appears Appears Appears
Day 4: kikAI Day 5: jinnAI Day 5: ihAI Day 2: keitAI Day 3: gyoukAI
Appears Body Only Body Only Absent Appears
Day 3: kyuusAI Day 4: syuurAI Day 4: irAI Day 5: dakkAI Day 6: kekkAI
Appears Appears Absent Mentioned Absent
Day 5: kenzAI Day 5: jutAI Day 5: kokkAI Day 6: sousAI Day 6: hakAI
Absent Appears Appears Absent Flashback
kassAI BRaiN PaiN VaiN SWaiN
Appears Absent Absent Voice Only Absent
Absent Absent Appears Appears Voice Only
MaiN: 1 MaiN: 2 MOUNTaiN CHaiN
Absent Absent Voice Only Absent




  • The kanji in Boss's family name can be read differently: 暮 (kura) can also be read as “bo” and 主 (nushi) can be read as “su”, making her name "Bosu," a pun on her nickname.
  • The first kanji in Boss's given name, 静 (shizu), means “quiet”, hence Mizuki thinking the name does not fit her.
  • In Day 5: Tuesday –ihAI–, after "Boss" is revealed to be Saito Sejima, the catchlight in Boss's eyes disappears. This animation is used in other routes of the game, including:
    • Day 3: Sunday –rihAI–, when Date denies dreaming about kissing pornstars. Boss responds with "You sure about that?" using "Saito's" expression.
    • Day 5: Tuesday –syokuzAI–, when Aiba is about to present new evidence in the New Cyclops Serial Killings. Allegra Clark, the voice actress for Boss, revealed that Saito is in the body of Boss during this scene.[1]
  • In a fan-made Character Poll for AI: The Somnium Files held on Twitter, Boss came in 4th place.[2]
  • In the Famitsu Interview, Kotaro Uchikoshi and Akira Okada stated that the design for the 4th victim of the Original Cyclops Serial Killings was actually Boss's original design. Once her design was changed, they reused the original design for the victim as she appears in PSYNCIN' IN THE VaiN.[3]


AI: The Somnium Files
AI: The Somnium FilesAI: The Somnium Files DemoRaiNBOW AFFaiR Complete SoundtrackREVERIES IN THE RaiN SoundtrackTHOUGHTS REMaiN BELOW Artbook
Kaname DateAI-Ball/AibaIris Sagan/A-setOta MatsushitaMizuki OkiuraBossPewterNew Cyclops Killer
Hitomi SaganMayumi MatsushitaRenju OkiuraMamaShoko NadamiSo SejimaMoma KumakuraRohan KumakuraCyclops Serial Killer
#89FalcoBodyguardsTakero MatsushitaManaka IwaiSaito SejimaYakuza AYakuza BNurseReceptionistMermaidTaxi DriverInspector
Chiyoda District: Police Headquarters (Boss's Office; Psync Room; Interrogation Room) • Sunfish Pocket
Koto District: Harbor Warehouse District (Cold Storage Warehouse) • Date Residence
Meguro District: Sagan ResidenceTiefblau
Minato District: Sejima ResidenceKumakura OfficeIkume ShrineLemniscateCentral Hospital
Near Kabasaki District: Bloom ParkOld Chemical PlantMatsushita Diner
Shinjuku District: Golden Yokocho (Marble)
Other: Fuchu City (Fuchu Prison) • Akikawa ValleyOkutama MountainsEitoku High
SINKIN' IN THE BRaiN (Spoiler) • PSYNCIN' IN THE PaiN (Spoiler)
PSYNCIN' IN THE VaiN (Spoiler) • PSYNCIN' IN THE SWaiN (Spoiler)
PSYNCIN' IN THE VILLaiN (Spoiler) • PSYNCIN' IN THE MaiN: 1 (Spoiler)
PSYNCIN' IN THE MaiN: 2 (Spoiler)
Red Route: sigAIsaikAImeikAIsyokubAIrihAI
Yellow Route: syougAIseisAIhiAIsanpAI
Green Route: gumAIjukkAIkikAIjinnAIihAI
Purple Route: keitAIgyoukAIkyuusAIsyuurAIirAIdakkAIkekkAI
Pink Route: kenzAIjutAIkokkAIsousAIhakAIkassAI
Tokyo Metropolitan Police Department (Advanced Brain Investigation Squad) • Ujisaki Family (Kumakura FamilyKumakura Estates) • Secret Society NAIXATLOZForeign Mercenaries
LemniscateSunfish PocketMarbleTiefblauFamiSto8-12Elgorg
Wadjet SystemEvolverLight Synaptic Nerve Connection DeviceDate's CarShovelForgeOdoroki-man ChocolateGeostationary Satellite X00639
Chemical Plant ExplosionOriginal Cyclops Serial KillingsBreak-In at Sagan ResidenceNew Cyclops Serial KillingsIncident at Minato District HighwayDisappearance of Renju OkiuraOperation: Iris Rescue
Full List of Events
Lemniscate YouTube Series
Lemniscate (channel)To-Witter Archives 2019 (Tesa)To-Witter Archives 2020 (Tesa)

To-Witter Archives Aseton: Main PageAseton Plays DanganronpaRevisiting the YouTube seriesTokyo Game Show & AI Launch DayAseton Zero EscapeAseton Terraria PioneerCrypt of AsetonAseton of HyruleIndivisible Aseton
Weibo Archives
A-set To-Witter (English)A-set To-Witter (Japanese)a_set_on Weibo (Chinese)Mato To-WitterKotaro Uchikoshi Eng To-WitterFluerichaji To-Witter

Love Songs From Another WorldVirtuoso of the Space Time Continuum
A-set (impostor) • Ota MatsushitaMizukiKotaro UchikoshiFluerichajiWhite Horse WomanBloody Polar Bear
Renju OkiuraHitomi SaganMayumi MatsushitaMama****** ****AI-BallBossPewterYūsuke KozakiAkira OkadaCyclopsAmame DoiHorusBastet • "Uncle" • Missing Girl • Missing Girl's Parents
Tokyo: Sagan ResidenceLemniscate OfficeSunfish PocketKabasaki DistrictBloom Park (Somnium) • Old Chemical PlantMatsushita DinerIkume ShrineGolden Yokocho (Marble) • Harbor Warehouse District (Okiura Fishery Cold Storage Warehouse) • Sejima ResidencePolice Headquarters (Boss's Office/Psync Room) • Okutama Mountains
USA: San FranciscoCalifornia
LemniscateSpike ChunsoftSecret Society NAIXATLOZGame Developers ConferenceSunfish PocketMarbleTokyo Metropolitan Police Department (Advanced Brain Investigation Squad) • Anime Expo
A-set's video seriesCyclops Serial KillingsChemical Plant ExplosionDisappearance at Bloom ParkA-set's campaign against NAIXATLOZSpike Chunsoft's panel at GDC Disappearance of Iris SaganImpersonation of Iris SaganIris Sagan's playthrough of AI: THE SOMNIUM FILESVisit to the Somnium Files DiscordSpike Chunsoft's panel at Anime Expo 2019
Videos (Pre-release)
0: Uchikoshi Introduces Net Idol A-set! (Invincible Rainbow Arrow)
1: Tesa's Top 3 Favorite Snacks and Mascots!
2: Tesa Visits Maid Cafe Sunfish Pocket!
3: There's No Way This Trespassing Idol Can Be This Cute!
4: Tesa's Matsushita Diner Review! Omelet Rice Edition!
5: A-set Reservations Unknown
fAInal: rw nw prt m hrw
A-set's GDC All-Access Convention Report!
Sneaking Into ABIS!
Exploring a Dreamworld!
This Is Your Idol
7: Zanki Zero Let's Play! Can Tesa Survive the Ruins?! (Alt)
8: It’s time to talk about the Cyclops Case (might lose subscribers for this...)
9: My 10-Day Vacation Diary
10: AI: THE SOMNIUM FILES Let's Play! Detective Tesa!
11: That Time I Got Forced To Do Impressions by an Egyptian God
12: Tesa's Spirited Away Adventure: Picture Book Edition!
13: Tesa Answers Over 30 Questions at Super Speed!
14: "Invincible Rainbow Arrow" Dance feat. Mizuki, Ota, and...White Horse Woman?!
15: Sneak Peek at AI: THE SOMNIUM FILES LE/Day One Edition!
16: You Won't Believe the Friend I Just Made! (Secret video)
17: Graduation (AX Panel)
Videos (Post-release)
18: A-set's AI: THE SOMNIUM FILES Exclusive Launch Day Let's Play
19: AI: THE SOMNIUM FILES Let's Play Part 2! Ota is here!!!