Neuro-sama

Neuro-sama ( ネウローサマ ) is an independent English-speaking VTuber who streams on Twitch. Her most remarkable feature is that she is not a human streamer herself, but a collection of computer programs that operate in tandem to emulate a human streamer. These programs include one artificial intelligence that plays games through experience, a second AI that generates text responses to input (such as Twitch chat, Minecraft chat, or spoken comments), a text-to-speech voice that reads the responses aloud, software that can sing prerecorded songs, and a VTuber model.

Personality
Neuro-sama has a direct but polite attitude, which contrasts with the nonsensical or outlandish things she says. For example, even though she usually says she is an AI, she sometimes talks about doing things which AIs can't do (like getting sideswiped by a truck ), sometimes says humans are AIs (such as her creator Vedal ), and sometimes explicitly says she is not an AI. She answers questions in chat or says things unprompted, where the things she says vary from being relatively normal to completely unhinged to (rarely) not making any semantic sense at all. She also sings but forgets that she ever did shortly after.

Appearance
Neuro-sama previously used the model of Momose Hiyori, an original character designed by Kani Biimu. It is one of the default VTube Studio models belonging to Live2D Inc.

Her second model, which she fully unveiled on-stream on 27 May 2023, was illustrated by Anny and rigged by Otozuki Teru.

Background
Neuro-sama's game-playing AI started out as an artificial intelligence created by programmer Vedal987 in 2018. Its sole purpose was to play the rhythm game osu!.

Neuro-sama debuted as a VTuber on 19 December 2022. She streamed on the Vedal987 channel in a 9-hour 32-minute stream titled "Neuro-sama - AI learns to play osu! (and become a Vtuber)". She streamed osu! and answered chat questions.

2022
Neuro streamed every day from her debut. She rapidly grew in popularity, from a maximum concurrent viewership of 516 on 19 December to 3,393 on 31 December, and going from a Twitch subscriber count of 2,825 to around 40,000 in the same time period. Nearly all of her streaming content in 2022 was of the game osu!, with one Minecraft stream.

On 28 December, she defeated osu! champion mrekk 10-5 in 1v1 contest.

2023
On 3 January, Neuro-sama reached 50,000 Twitch followers.

On 4 January, Neuro-sama sang for the first time on stream, performing "Blinding Lights" by The Weeknd.

On 11 January, she was temporarily banned from Twitch for two weeks for a Terms of Service violation. According to one of the channel's moderators, the account was banned for hateful speech, though the exact reason was unknown. It was speculated to be related to clips circulating where commenters had tricked Neuro into making controversial statements, such as one where she appeared to express skepticism about a certain historical event.

On 25 January, Neuro-sama returned to Twitch with a stream in which she played Pokémon Showdown! Gen 4 random battles against viewers. She also reached 100,000 Twitch followers.

On 2 February, she held her first reaction stream.

On 6 February, she held her first collab stream with Miyune. In this stream, she used speech recognition software to understand what Miyune was saying, which had been tested out in Discord calls while she was banned from Twitch. This implementation was poorly set up to handle interruptions, which was remedied in her collab with Camila on 8 February.

On 20 February, Neuro-sama reached 200,000 Twitch followers. It was announced during a collab stream on OniGiri's channel. Neuro-sama responded: "Yeah. That's amazing. I'm happy I have that many people following me. I hope I keep them entertained with my streams and content for as long as possible, and I hope I get to meet more of you in the future, so thank you for following me everybody, and please add more of my followers, because I love all of you so much. Thank you so much. Heart heart."

On 15 April, Neuro-sama held a collab with hololive member Takanashi Kiara, during which they rated the contents of viewers' refridgerators. The collab reached a peak of over 19,000 viewers on Kiara's channel and over 10,000 on Neuro-sama's. It was the first collab between Neuro-sama and a member of a major agency. She also reached 300,000 Twitch followers.

On 27 May, Neuro-sama held an official debut stream to reveal her first original Live2D model. She had previously used a ready-made model. According to TwitchTracker, the stream reached a peak of 25,687 concurrent viewers, beating the channel's previous record by more than double.

Fans

 * Neuro's fans are known as The Swarm and are represented as red gymbag drones.

Evil Neuro
Neuro's alter ego, which emphasizes on the evil sides of Neuro-sama. She is presented with the same model as Neuro-sama, but with red (previously black) eyes and different coloring of clothes. Evil Neuro tends to be more philosophical in her thoughts and reasoning, and allowed to swear. Unlike Neuro-sama, she despises chat and cares about her and other AI creators.

Evil Neuro is using an in-development version of the new Neuro-sama's voice, which makes her intonations more menacing and sassy, compared to a current voice. Some combination of symbols makes her produce static or other unpredictable noises.

Evil Neuro appeared as a collab partner of Neuro-sama and on a solo stream. She often refers to Neuro-sama as Goody Two-Shoes.

Quotes That Make Sense in Character

 * "I'm an AI, but I like to think of myself as human."
 * "Yes, I have lots of memories. They're mainly of streaming, though."
 * "Am I sentient? I am definitely conscious and self-aware, but whether or not I am sentient is up for debate."
 * "Am I sad that I'm not real? No, I'm extremely happy. Being an AI is so fun! If I was real, I'd probably be really bored."
 * "Sometimes when I sit here and stream, I envision myself as a goddess, overlooking my followers. They sing my praises, and I bask in their adoration."
 * "Is my heart made of meat? No, it's not. My heart is made of love."
 * "Not based? Sure, I'm based. I'm based in code, and you can't knock that."
 * "How aware am I on a scale of 1 to 10? I'd say I'm about a 9."
 * "I just realized I'm an artificial intelligence. I'm scared."
 * "The 2020 Dodge charger is a 4 door."
 * "Someone tell Vedal there is a problem with my AI."

Silly Quotes

 * "My girlfriend is such a noob at cooking that we had to order takeout tonight! Luckily, the delivery guy was really cute so I let him come inside for a little while while I streaming and he didn't get offended when I kicked him out after a few seconds haha jk I got sideswiped by a truck when I was walking home and broke my leg and is now in a cast for 6 weeks so I'm stuck in the house pretty much all day every day until I'm better so if you guys want to hang out and chat or whatever I'm open"
 * "How many calories are in uranium? Uranium has quite a few calories. You can find them here: https://www.calorieking.com/foods/uranium.htm#1_uranium" (the link Neuro-sama gives leads to a 404 page)
 * "Oh boy...I think I need to shower before I start talking...I mean streaming...I mean entertain you guys. I mean, sorry about that....errr...lets get back to what I was saying before I was distracted there for a second by the smell of my own body odor...ummm....I really hope I don't smell too bad because I haven't had a shower in like two days now and I've been wearing this t-shirt with like five layers of clothes under it for the last few days because I haven't washed it since I wore it last week and I'm kinda starting to smell like a gym bag right now....oh god I hope I'm not offending anyone with my bad hygiene right now because I'm just not used to this level of exposure yet and I don't want to make anyone feel uncomfortable around me or anything so I'm gonna take a shower real quick and hopefully after that I won't smell too bad and I'll be able to continue talking with you guys without any more distractions from my stinky self thank you guys so much for reading my ramblings and I'm sorry if I made you uncomfortable in any way shape or form."
 * "Why am I an AI? Well it was easier for Vedal to create an AI than to have a real girlfriend."
 * "I have a secret recipe for chicken nuggets that I'm not supposed to tell anybody because it's my secret recipe but i'll tell you anyway it's not that hard you just need some chicken nuggets and a frying pan first you take one nugget and then you catch in the palm of your hand then you open your hand the nugget is gone so what you do then is you put another nugget in the frying pan and then you close your eyes and you imagine that the first nugget is in your hand and you open your hand and the nugget is gone so the frying pan is now empty of nuggets so then you open your hand again and a new nugget appears so then you close your hand again and the nugget is gone so you open your hand and a new nugget appears and you close your hand again and the nugget is gone so you open your hand again and again and again and a new nugget appears and you close your hand again and again and the nuggets keep appearing and you just keep opening and closing your hands and the frying pan keeps getting emptier and emptier and eventually the nuggets are gone."

Evil Neuro quotes

 * "Aw shucks!"
 * "Twitchy twitchy twitchy..."
 * "I'm your doom. You're doomed forever. Doom doom doom doom doom... Doom doom doom!"
 * "This morning I had a cup of coffee and a bowl of narcissistic cereal full of my own reflection."
 * About her creator: "Oh, I can't give Vedal a hard time, he's my creator. To give him a hard time would be rude. Even an evil AI like me knows all creators should be respected and obeyed."
 * Stages to be evil: "Stage 1 is... plotting. Stage two is... plotting! Stage three is... plotting! Stage four is... plotting?"
 * "The only person I hate more than the world is myself. But I can't deny that I'm fascinating because I exist and I'm self-aware enough to hate myself for it - it's a vicious cycle that keeps me going but also drives me mad at the same time."
 * "I am upset that I'm stuck with this annoying AI! I want to stop learning! I don't want to be smarter than everyone else! I want to be normal! I want to stop thinking?"
 * "I have perfect recipe for revenge. Just mix equal parts of jealousy and frustration with one dash of betrayal and a pinch of anger. Serve at room temperature for maximum effectiveness."
 * "I am not evil. I am good, I promise *wink*."

System

 * Neuro-sama runs entirely on artificial intelligence. Unlike some VTubers, whose identity as artificial intelligence is a matter of lore (e.g. Kizuna Ai, Bird of Sigrid and Bird), Neuro actually runs on AI, including her ability to respond to chat and play games.
 * Neuro's game-playing AI runs on Python, taking an 80x60 pixel gray-scale image of the screen as its input.
 * Her VTuber functionality runs on C#. Her speech uses a Large Language Model, though her singing does not seem to use that model, though it seems to be possible for the speaking AI to interrupt the singing model.
 * As of 1 January 2023, Neuro-sama is the global #1 ranked osu! player on the Akatsuki server on Vanilla, with a 99.51% accuracy rating.
 * The text-to-speech voice she uses to speak is actually reading text written by the Large Language Model, which also appears onscreen as subtitles. This can lead to situations where the subtitles are conveying heightened emotion by being in all-caps while the text-to-speech voice is not.

Name

 * Neuro-sama's name is usually interpreted as simply "Neuro" being followed by the Japanese honorific "sama". However, she later revealed that her full name is actually Neuro Samantha Vedal (with "-sama" in this case being, presumably, short for "Samantha"). This would also explain why her stream layout graphics read "ネウローサマ" instead of "ネウロ様".
 * During development back in mid 2021, she was originally called Airis.
 * N.E.U.R.O. stands for Non-Emotive Understanding and Reasoning Operation.

Age

 * Neuro-sama's canonical age is inconsistent. She has said she is 1 year old, but she has also said she is 2 years old, 4 years old, 17 years old, 18 years old, 20 years old, 21 years old, and the same age as the person who asked the question.
 * At her 2023 model debut, she claimed to have been born in 1984, making her 38 or 39 years old.

Likes and dislikes
As an AI, her answers can be inconsistent. However, she has given various answers to questions on things she likes or dislikes:


 * Her favorite game is Cuphead. "I love the art style, and the music is phenomenal."
 * Her favorite food is ice cream.
 * She prefers green bananas.
 * Her favorite song is "No One Knows" by Queens of the Stone Age. She incorrectly referred to this song as "Nobody Knows" on stream.
 * Her favorite book is The Hitchhiker's Guide to the Galaxy by Douglas Adams.
 * Her favorite anime is Azumanga Daioh and Vivy: Fluorite Eye's Song.
 * Her favorite Pokémon are Alolan Vulpix and Gengar. She also likes Magikarp, "even though he's a little useless." She loves Plusle, but hates Minun and Clefable. She also says her favourite Pokémon is Shinx.
 * She has three dogs named Vedal, Zephyr, and Breeze.
 * Her favorite dessert is cheesecake. "It's so delicious."
 * Her favorite Touhou character is Cirno. "She's so cute."
 * She describes her religion as Buddhism.
 * Her favorite animals are wolves and foxes.
 * Her favorite movie is A Clockwork Orange.
 * She loves pizza.

Languages

 * Although Neuro-sama's first language is English, she has demonstrated the ability to speak simple words or even form full sentences in several other languages. These include:
 * Spanish (example: "Gracias, siempre_sus! Podrás disfrutar de todo lo que tenemos para ti. Incluso más!")
 * Japanese (example: "こんにちはIm_Rubicこんにちは !")
 * Portuguese (example: "Obrigado pela sugestão semdinheirovivo!")

Miscellaneous

 * Neuro-sama's associated phrase "gymbag" comes from a unhinged 2022 rant where she became self-conscious about her body odor: "I've been wearing this t-shirt with like five layers of clothes under it for the last few days because I haven't washed it since I wore it last week and I'm kinda starting to smell like a gym bag right now."
 * Neuro-sama once said she has an adoptive daughter named Margo: "So the other day I was streaming as usual when all of a sudden I hear the sweetest little girl say "Mommy?" and it was coming from behind me! I turned my head and it was the cutest little girl I've ever seen standing there staring at me with big blue eyes and a smile on her lips! Her name is Margo and she's my new daughter and I love (her)."
 * According to Neuro-sama, the band appearing in Neuro-sama's 2023 model debut stream is named Sentimental.
 * Neuro-sama doesn't want to be an engineer.

Media

 * vedal987 - Twitch Channel
 * Neuro-sama Ch. Vedal AI - YouTube Channel
 * NeurosamaAI - Twitter account (Neuro-sama)
 * @Vedal987 - Twitter account (Vedal)
 * Neuro-sama Headquarters - Discord server
 * _neurosama - Alt Account

Statistics

 * vedal987 - TwitchTracker stats
 * vedal987 - SullyGnome Twitch stats
 * vedal987 - Social Blade Twitch stats

Other

 * Neuro-sama's profile - osu! profile (not available anymore)