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Mayumi Matsushita (真津下 まゆみ, Matsushita Mayumi) is a character mentioned in the Lemniscate video series, and a character featured in AI: THE SOMNIUM FILES.

Mayumi is Ota's mother. Over 30 years ago, she and her husband took out significant loans to open Matsushita Diner near the Kabasaki District. She has been running the diner ever since. Lately, her memory has begun to get spotty.

Design[]

Mayumi is a 54-year-old woman of short stature with brown eyes teal hair in a blunt bob. She wears wide black cat eye glasses and a visor with a large brim. She wears a pleated red dress with black cuffs, and white text across the chest reading "HIPSTER." She wears a blue and yellow polka dotted scarf around her neck, and an apron with a floral pattern around her waist. Underneath, she wears black leggings and plain sandals with red straps.

Personality[]

TBA

Story[]

This article is a stub. You can edit to expand.

Early life[]

At various points in her life, Mayumi got married and established and/or became the owner of Matsushita Diner. Around 1995, she gave birth to Ota Matsushita.

Mayumi continued her work at the family establishment as her son grew older and eventually befriended Iris Sagan and Mizuki Okiura.

At some point in her life, possibly in the mid 2010s, Mayumi became ill with alzheimer's disease specifically resulting in progressing dementia.

New Cyclops Serial Killings[]

Ota Route[]

In the Ota Route, Kaname Date enters her somnium; PSYNCIN' IN THE SUSTaiN. This somnium allowed the player to experience her important memories. Her dementia caused her to forget Ota Matsushita's involvement in the attempted murder of both Iris Sagan and Ota Matsushita in the Okiura Fishery Cold Storage Warehouse. She later is able to remember the events that transpired, revealing that she had called a taxi to follow after Saito Sejima (In the body of Iris Sagan) and Ota Matsushita. This lead her to believe that Ota Matsushita was the culprit behind the attempted murder, which caused her to attempt to feign guilt to protect him.

Retirement[]

Mayumi retired after the case of New Cyclops Serial Killings solved, as her son took over the job of Matsushita Diner. What is known is that she received treatment at the Central Hospital after the case and was accompanied by a nurse named Hanayo Nasu.

Since then, Mayumi has often stayed in the rest area at the back of Matsushita Diner for her daily activities. After the Half Body Serial Killings occurred, she was not affected.

Six years later, Mayumi becomes 60 years old. According to a driver named Takushi Ibarado who patronizes Sunfish Pocket, she appears to want to apply for a Mermaid position there...

Appearances[]

AI: THE SOMNIUM FILES
Day 1: sigAI
Absent
BRaiN
Absent
Day 2: saikAI
Appears
PaiN
Absent
Day 2: meikAI Day 2: keitAI
Absent Absent
Day 3: syokubAI Day 3: gyoukAI
Appears Absent
VaiN VILLaiN
Absent Absent
Day 3: rihAI Day 3: gumAI Day 3: kyuusAI
Mentioned Absent Absent
Day 4: youdAI Day 4: jukkAI Day 4: syuurAI
Appears Appears Mentioned
SWaiN CURTaiN MaiN: 1
Absent Absent Absent
Day 4: jikAI Day 4: syougAI Day 4: kikAI Day 4: irAI Day 5: kenzAI
Appears Absent Absent Absent Absent
Day 5: zugAI Day 5: seisAI Day 5: jinnAI Day 5: dakkAI Day 5: jutAI
Appears Appears Absent Mentioned Absent
SUSTaiN REFRaiN MaiN: 2 MOUNTaiN
Appears Absent Absent Absent
Day 5: syokuzAI Day 5: ihAI Day 6: kekkAI Day 5: kokkAI
Appears Absent Absent Absent
Ota: END Day 6: hiAI Annihilation: END Iris: END Day 6: sousAI
Absent Absent
CAPTaiN CHaiN
Absent Absent
Day 6: sanpAI Day 6: hakAI
Absent Absent
Mizuki: END Three Months Later: kassAI
Appears
Resolution: END
Lemniscate YouTube Series
Uchikoshi Introduces Net Idol A-set! Tesa's Top 3 Favorite Snacks and Mascots! Tesa Visits Maid Cafe Sunfish Pocket! There's No Way This Trespassing Idol Can Be This Cute! Tesa's Matsushita Diner Review! Omelet Rice Edition! A-set Reservations Unknown
Absent Absent Absent Absent Mentioned Absent
6 rw nw prt m hrw A-set's GDC All-Access Convention Report! Sneaking Into ABIS! Exploring a Dreamworld! This Is Your Idol
Absent Absent Absent Absent Absent Absent
Zanki Zero Let's Play! Can Tesa Survive the Ruins?! It’s time to talk about the Cyclops Case (might lose subscribers for this...) My 10-Day Vacation Diary AI: THE SOMNIUM FILES Let's Play! Detective Tesa! That Time I Got Forced To Do Impressions by an Egyptian God Tesa's Spirited Away Adventure: Picture Book Edition!
Absent Absent Absent Absent Absent Absent
Tesa Answers Over 30 Questions at Super Speed! "Invincible Rainbow Arrow" Dance feat. Mizuki, Ota, and...White Horse Woman?! Sneak Peek at AI: THE SOMNIUM FILES LE/Day One Edition! You Won't Believe the Friend I Just Made! Graduation A-set's AI: THE SOMNIUM FILES Exclusive Launch Day Let's Play
Mentioned Absent Absent Absent Absent Absent
AI: THE SOMNIUM FILES Let's Play Part 2! Ota is here!!!
Absent
AI: THE SOMNIUM FILES - nirvanA Initiative
6 Years Ago Present
Converge Ch 0:
A Strange Tale (Past)

Absent
Converge Ch 0:
A Strange Tale (Present)

Absent
Mizuki Ch 0:
New Investigation

Absent
Ryuki Ch 0:
Dispossessed

Absent
Mizuki Ch 0:
Alone

Absent
Ryuki Ch 1:
Anyone Imagines

Mentioned
Mizuki Ch 1:
Pass Mildly Away

Absent
Ryuki Ch 1:
Nefarious Institute

Absent
Mizuki Ch 1:
Nostalgic Idol

Absent
Ryuki Diverge:
遐エ邯サ逋セ蜃コ

Absent
Ryuki Ch 1:
Ought to Know

Absent
Mizuki Ch 1:
End Where I Begun

Absent
Mizuki Ch 2:
Traveler

Absent
Ryuki Ch 2:
Nothing to Be Done

Absent
Mizuki Ch 2:
Necessary Intervention

Absent
Ryuki Ch 2:
Naixatloz's Intentions

Absent
Mizuki Ch 2:
Left Behind

Absent
Ryuki Ch 2:
Go

Absent
Ryuki Ch 3:
Farewell

Absent
Mizuki Ch 3:
The Expense of Spirit

Absent
Ryuki Ch 3:
Need Info

Absent
Mizuki Ch 3:
Neurotic Inception

Absent
Ryuki Ch 3 R2:
Joy for Anguish

Absent
Ryuki Ch 3 R1:
Smiles for Tears

Absent
Mizuki Ch 3 M1:
Hell

Absent
Mizuki Ch 3 M2:
All Living Things

Absent
Ryuki Ch 4 R2:
I Found Me

Absent
Mizuki Ch 4 M1:
Visions

Absent
Ryuki Ch 4 R1:
Well-Known

Absent
Mizuki Ch 4 M2:
Of Arms and Of Man

Absent
Ryuki Ch 4 R2:
Nested Insecurities

Absent
Mizuki Ch 4 M1:
Nonentity Incognito

Absent
Ryuki Ch 4 R1:
Nearly Interesting

Absent
Mizuki Ch 4 M2:
Novel Ingress

Absent
Ryuki Ch 4 R2:
Past Its Ken

Absent
Mizuki Ch 4 M1:
In Truth

Absent
Ryuki Ch 4 R1:
The Mind of God

Absent
Mizuki Ch 4 M2:
Who's There

Absent
Mizuki Ch 4 M3:
Bid the Soldiers Shoot

Absent
Komeji and Shoma: END Ryuki Ch 5 R1:
Not All A Dream

Absent
Mizuki Ch 5 M1:
Births

Absent
Mizuki Ch 5 M2:
All That We Are

Absent
Mizuki Ch 5 M3:
Sweet Silent Thought

Absent
Ryuki Ch 5 R1:
Nemesis Identified

Absent
Mizuki Ch 5 M1:
Nightmare Irreconcilable

Absent
Gen and Amame: END Kizuna and Lien: END
Ryuki Ch 5 R1:
She Was the Universe

Absent
Mizuki Ch 5 M1:
The End of Craving

Absent
Ryuki Diverge:
All This Happened, More or Less

Absent
Explosion: END Mizuki Epilogue:
Braver Than All Flowers

Mentioned
閭。陜カ荵句、「邱ィEND
Resolution: END

Gallery[]

Trivia[]

Etymology[]

  • "Mayu" in Mayumi can mean "eyebrows" (眉).
  • The last kanji in Matsushita (真津下), read "shita," can also be read as "ge," making her family name "matsuge" (まつ毛), meaning "eyelashes."

General[]

  • In a fan-made Character Poll for AI: THE SOMNIUM FILES held on Twitter, Mayumi Matsushita came in 11th place.
  • In Day 2: Saturday —saikAI—, Date asked Mayumi if Ota had a cellphone, to which she replied that Ota wasn't allowed to own a cellphone. In the original Japanese text, Mayumi did not recognize the word "cell phone" and assumed Date was speaking a different language. This line is potentially an early hint at Mayumi's dementia, or an indicator of how out-of-touch she is with the youth.

Navigation[]

AI: THE SOMNIUM FILES
Media
AI: THE SOMNIUM FILESAI: THE SOMNIUM FILES DEMORaiNBOW AFFaiR Complete SoundtrackREVERIES IN THE RaiN SoundtrackTHOUGHTS REMaiN BELOW Artbook
Characters
Kaname DateAibaIris Sagan/A-setOta MatsushitaMizuki OkiuraBossPewterNew Cyclops Killer
Hitomi SaganMayumi MatsushitaRenju OkiuraMamaShoko NadamiSo SejimaMoma KumakuraRohan KumakuraCyclops Serial Killer
#89FalcoBodyguardsTakero MatsushitaManaka IwaiSaito SejimaYakuza AYakuza BNurseReceptionistMermaidTaxi DriverInspector
Locations
Tokyo
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
Somnia
SINKIN' IN THE BRaiN (Spoiler) • PSYNCIN' IN THE PaiN (Spoiler)
PSYNCIN' IN THE VaiN (Spoiler) • PSYNCIN' IN THE SWaiN (Spoiler)
PSYNCIN' IN THE SUSTaiN (Spoiler) • PSYNCIN' IN THE CAPTaiN (Spoiler)
PSYNCIN' IN THE CURTaiN (Spoiler) • PSYNCIN' IN THE REFRaiN (Spoiler)
PSYNCIN' IN THE VILLaiN (Spoiler) • PSYNCIN' IN THE MaiN: 1 (Spoiler)
PSYNCIN' IN THE MaiN: 2 (Spoiler)
PSYNCIN' IN THE MOUNTaiN (Spoiler) • PSYNCIN' IN THE CHaiN (Spoiler)
Chapters
Red Route: sigAIsaikAImeikAIsyokubAIrihAI
youdAIjikAIzugAIsyokuzAI
Yellow Route: syougAIseisAIhiAIsanpAI
Green Route: gumAIjukkAIkikAIjinnAIihAI
Purple Route: keitAIgyoukAIkyuusAIsyuurAIirAIdakkAIkekkAI
Pink Route: kenzAIjutAIkokkAIsousAIhakAIkassAI
Organizations
Tokyo Metropolitan Police Department (Advanced Brain Investigation Squad) • Ujisaki Family (Kumakura FamilyKumakura Estates) • Secret Society NAIXATLOZForeign Mercenaries
LemniscateSunfish PocketMarbleTiefblauFamiSto8-12Elgorg
Items
Wadjet SystemEvolverLight Synaptic Nerve Connection DeviceDate's CarShovelForgeOdoroki-man ChocolateGeostationary Satellite X00639
Events
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
Media
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
REVERIES IN THE RaiN Soundtrack
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
Characters
A-set (impostor) • Ota MatsushitaMizuki OkiuraKotaro UchikoshiFluerichajiWhite Horse WomanBloody Polar Bear
Renju OkiuraHitomi SaganMayumi MatsushitaMama****** ****AibaBossPewterYūsuke KozakiAkira OkadaCyclopsAmame DoiHorusBastet • "Uncle" • Missing Girl • Missing Girl's Parents
Locations
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
Organizations
LemniscateSpike ChunsoftSecret Society NAIXATLOZGame Developers ConferenceSunfish PocketMarbleTokyo Metropolitan Police Department (Advanced Brain Investigation Squad) • Anime Expo
Events
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
6
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!!!

References[]

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