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Eureka X49
About
Eureka X49, also known as Yurika Shiki and Experiment #49 Eureka, was an independent Chinese-language VTuber who streamed on YouTube from September 2020 until her graduation in 2025. She later rebranded to Kishi to focus on her utaite work, continuing to engage with fans through various social media platforms under this new identity.
Bios from their socials (3)
Bio (from YouTube)
kishi・きし・키시 idol and anime otakatsu enjoyer that likes to sing ただの歌う好き推し活するオタクです ୨ৎ membership めんばーしっぷ https://www.youtube.com/channel/UCwjLQHaJPwkbcD3wy4cV09w/join ୨ৎ tip こづかい https://ko-fi.com/kishi_ex ୨ৎ HP https://kishiex.carrd.co/ ୨ৎ Twitter https://twitter.com/kishi_ex ୨ৎ Twitch https://www.twitch.tv/kishi_ex ୨ৎ Discord https://discord.gg/uaFFR6VJ6Z
Bio (from Twitter)
ex EUREKA X49 ☣️ still a brat ʕ•̀ω•́ʔ ただの歌いたいし推し活したいｵﾀｸです 🪽@Sancta__Lilium 🔎#kishichama 🔞#ecchishi 🧬@moshiestudio sub @chinuhodo
Bio (from Twitch)
give me attention かまってほちぃ｜https://throne.com/eurekax49/wishlist
Character Info
Community
Recent Activity
Introduction Video
Gallery
Personality
Eureka speaks with a British accent.
Appearance
Eureka has silver hair with an ahoge and single light yellow streak in her bangs with green and yellow eyes, with piercings and a blue bandage on her cheek. She wears has a black and yellow zipped-up jacket with a bare midriff. She has a QR code on her leg. Her charm point is her fang.
Background
Eureka first revealed her original 3D model on 2 September 2020 and uploaded introduction video on 9 September 2020. She made her debut stream on 18 September 2020.
Her initial concept was a purely digital being, with a canonical height of 536 pixels. Her full name was "Project: Eureka Experiment #49."
Fans
- Eureka's fans are known as "Mandem", "Lab Rats", or "Rekadan".
Lore
- Eureka is the 49th in a series of artificial lifeforms created by the Professor as part of Project: Eureka. The first 48 were destroyed. * Eureka is a genetically modified human. She was originally a digital creation, but acquired a human body. * Eureka does not know where she lives, because she has never been outside. * Her tail is a power cord and plugs into her spine. It is USB-A. ** Her tail can use various attachments, including a microphone for karaoke and a box cutter for building plastic model kits. * Eureka wears fingerless gloves to improve her magic defense. * She is part of the Martian Assassination Association, or "MAss Ass". She often takes breaks to attend assassin training on Mars.
Likes and dislikes
- Eureka's favorite color is yellow blue.
- She loves the anime Mobile Suit Gundam 00.
- She loves Saji Crossroad Setsuna F. Seiei.
- She hates Saji Crossroad.
- Her favorite train is the Ginza line, because it looks like pudding.
- Eureka's favorite food is cookies. Her favorite drink is water coolant.
- Eureka likes underground idols, anime (especially by Kyoani), games (MMORPG, Pokémon, and FPS), martial arts, and sweets. She dislikes mornings.
- She likes the Pokémon Toxel, martial arts, and sugar.
- Her fears are dolls, clowns, and turning into pizza.
Miscellaneous
- She has a brother complex.
- She tends to oversleep.
- She speaks in a Martian accent that is curiously close to a British accent.
Contributors
This profile is enriched by VTuber Wiki community editors. Thank you to:
Credits sourced from VTuber Wiki page revision history. Vtubie and Hololist do not expose per-page contributor data, so this list reflects VTWiki editors only.
Frequently mentioned
More VTubers from United Kingdom
Art credits
Designers, illustrators, riggers and modelers credited on the official character.
- 3D ModelerEurekaX49
- 3D ModelerIllustration (2D): Moshie
- 3D ModelerPixel
- ModelerPoribaketsu
More Info
2020
On 22 November, Eureka announced that she had reached her first YouTube 100 subscribers.
2021
On 6 April, Eureka reached 500 YouTube subscribers.
Around 3 August 2021, she reached 1,000 YouTube subscribers.
On 11 September, Eureka held a re-debut stream to reveal her Live2D model. It was attended by 69 viewers.
2022
On 1 January, Eureka revealed a new pixel model by Poribaketsu. She also announced a Minecraft server.
On 31 May, Eureka announced a hiatus, followed by a karaoke stream on 3 June. She planned to return for her birthday on 3 July.
2023
On 15 January, Eureka reached 2,000 YouTube subscribers in an endurance karaoke stream.
Rebrand
On 18 August, she began teasing a rebrand by posting a series of mysterious previews.
On 10 September, she announced a rebrand from "Eureka" to "Kishi." Her emoji changed from ☣️ (biohazard symbol) to 🩹 (band-aid), and several accounts were renamed from "eurekax49" to "kishi_ex".
On 21 September, she held a re-debut stream, revealing a new model and identity. From this point she would continue to stream as the VTuber and utaite Kishi. The character of Eureka X49 was effectively retired.
Quotes
- "Everyone is my mandem, innit?"
- "Why do you want to be normal when you could be extraordinary?"
- "This is my nub cup"
- "KSKSKASDSLAS STOP"
- "i only say seiso things"
- "im not horny im curious"
- "GOOD MOREKAAAAA!"
Name
- Eureka's name is written various ways: ** Her surname is written X49 (for Experiment #49) or 四九 (kanji for 49), read Shiki. ** Her given name is Eureka or ゆりか, read Yurika. ** Her full name is variously written in English and Japanese order: Eureka X49, X49 Eureka, Yurika Shiki, and Shiki Yurika.
Goals
- Eureka's goals are to get a Live2D model, do a 3D model idol live, and to get good at FPS games. ** She acquired her Live2D model on 11 September 2021. She has never gotten good at FPS games. * At her Live2D re-debut, she announced new goals to speak better Japanese, get "STRONK", start a Eurekaland community Minecraft server, become a robot, and maybe become an idol. ** She established the Eurekaland Minecraft server on 1 January 2022. * Her fears are dolls, clowns, and turning into pizza.
Media
- EUREKA X49 四九ゆりかch - YouTube channel
- eurekax49 - Twitch channel
- @eurekax49 - Twitter account
- eurekax49 - Marshmallow account
- eureka - Ubereats fund
- Rekadan Laboratory - Discord server
- eurekax4x9 - carrd
Hashtags
- #eureCAST - Stream tag
- #eureCANVAS - Fan art tag
- #eroreka - Fan art tag (18+)
- #eureCACHE - Notes tag
Statistics
- eurekax49 - TwitchTracker stats
- eurekax49 - SullyGnome Twitch stats
- eurekax49 - Social Blade Twitch stats
- EUREKA X49 四九ゆりかch - Social Blade YouTube stats
- EUREKA X49 四九ゆりかch - Playboard YouTube stats