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Mizumiya Su (水宮枢) is a Japanese-speaking Virtual YouTuber affiliated with hololive DEV_IS, a branch of hololive production. She debuted on 9 November 2024 as part of the unit FLOW GLOW alongside Isaki Riona, Koganei Niko, Rindo Chihaya and Kikirara Vivi.
Introduction video
【初配信】ゴゴゴゴ、、-水宮枢初配信 -hololiveDEV IS -FLOWGLOW
Su's introduction.
Profile
"Is your Su-charge at 100%?"
The publicity manager of FLOW GLOW.
Determined to gain love and praise, she posts regularly on social media with her mouth full of delicacies.
Just when she wished the world was a less daunting place, fate led her to the friends she has now. Guess not all hope is lost, is it?
Thank you gods. Now, while you're at it, please make her a little bit taller.
Personality
Appearance
She has light blue hair in braids in blue bows with pink streaks through out and a large lightning-ish shaped ahoge and light blue eyes with black hairclips and a crossed blue hair accessory with white headshot of a ghost like mascot.
History
Background
FLOW GLOW was first teased on 6 November 2024 on hololive's Twitter account featuring ReGLOSS members.[2]
On 7 November, on FLOW GLOW's YouTube channel, a teaser was published presenting its members.[3] Shortly after a teaser video was published in each member's channel.[4] Su also made her first tweet on this date.[5] Her YouTube channel was created on 1 August 2024.
On 8 November, FLOW GLOW released their first original song FG ROADSTER."
Su debuted on 9 November, reaching 100,000 subscribers on YouTube.[6] She also released her fist cover of the song "Kanzen Houki Sengen."
2024
On 11 November, each FLOW GLOW member lost around 60,000 followers in another YouTube subscriber cull.[7] Su re-reached the milestone on 19 November.
On 23 November, Su enabled Super Chat feature on her YouTube channel.[8]
On 12 December, she opened membership feature on her YouTube channel.[9]
2025
On 16 January, Su reached 200,000 subscribers on her YouTube channel during an endurance karaoke stream.[10]
On 3 March, she reached 300,000 subscribers on her YouTube channel.
On 14 March, FLOW GLOW released their second original song "24K GOLD."[11]
On 7 June, she reached 400,000 subscribers on her YouTube channel during an endurance karaoke stream.[12][13]
On 9 July, FLOW GLOW released their third original song "LOAD."
On 20 September, FLOW GLOW released their fourth original song "good enough."
On 4 October, she reached 500,000 subscribers on her YouTube channel during an endurance karaoke stream, making her the 70th hololive member and also the 2nd FLOW GLOW member to reach the milestone.[14][15]
On 9 November, during FLOW GLOW's first anniversary, they announced their first album "FLOW GLOW" and released their fifth original song "stay by my side." FLOW GLOW also announced that they would get 3D models.[16]
Discography
- Main page: Mizumiya Su/Discography
| FLOW GLOW | as FLOW GLOW | 21 January 2026 |
|---|---|---|
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 | |
| External links | ||
| Digital Release | ||
| stay by my side | as FLOW GLOW | 10 November 2025 |
|---|---|---|
|
 | |
| External links | ||
| Digital Release • Music Video • YouTube | ||
Events
- On 7 November 2024, hololive announced that a FLOW GLOW-themed pop-up store would open from 13 to 17 November in Harajuku Hakkakukan to commemorate FLOW GLOW's debut.[17][18]
Mascot and fans
- Her fanbase name is "Suurisu"「すうりす」.[19]
Relationships
- "Roromero" 「ろろめろ」, alongside Shiga Riko.
Trivia
Name
- Her surname Mizumiya is spelled 「水宮」, with the kanji meaning "water" and "palace."
- Her given name Su is spelled with the kanji 「枢」. It may be from the word 中枢, "chuusuu," meaning a central figure or key person. The kanji on its own is normally read as the female names "kaname" or "kururu." Single-syllable given names are rare in Japanese except as a nickname.
Likes and dislikes
- She like dancing, cute things, light blue, eating, and shabu-shabu hotpot.
- She dislikes measuring height, insects, kanji, clams, and staying up all night.
- Her dreams and goals include becoming a daily source of enjoyment for everyone, like a daily meal for her; doing a dance-focused live show; collaborating with Tuxedo Sam someday, in any form.
- Her oshi is Oozora Subaru.
Miscellaneous
- Her special abilities are dancing and dexterity.
- At 151 cm, Su is the shortest in FLOW GLOW.
- Su shares the same character designer as Amakawa Hano of Re:Act and Maibyou Kusuri of MarbleCreators.
External links
Media
- Su Ch. 水宮枢 - FLOW GLOW - YouTube channel
- Mizumiya Su's corporate profile on hololive.hololivepro.com
- @mizumiya_su - Twitter account
Hashtags
- #水宮枢 - General
- #すう成長中 - Stream
- #すくすく枢 - Fan art
- #AIすくすく枢 - AI Fan art
- #おうちに枢 - Merch
- #枢といっしょ - Voice impressions
- #枢発見 - Events
- #枢ごはん - Other stuff
References
- ↑ gyoza ch.date=2025, January 21. (n.d.). The continuous societal strifes of Mizumiya Su. [Video]. YouTube.
- ↑ hololive production [@hololivetv]. (2024, November 6). 11/7 12:00 GET READY...💕 #FLOWGLOW [Tweet]. Twitter.
- ↑ hololive DEV_IS FLOW GLOW [hololive DEV_IS FLOW GLOW]. (2024, November 7). #FLOWGLOW - GET READY? [Video]. YouTube.
- ↑ Mizumiya, S. [Su Ch. 水宮枢 - FLOW GLOW]. (2024, November 7). #水宮枢 - DEBUT PV【#FLOWGLOW】 [Video]. YouTube.
- ↑ Mizumiya, S. [@mizumiya_su]. (2024, November 7). 天才の降臨❕❕❕ えらい宣伝たんとー水宮枢です！すごくかしこーな子です！！ とにかくえらいのでいっぱい褒めて貰う活動頑張ります🍥❕ [Tweet]. Twitter.
- ↑ Mizumiya, S. [Su Ch. 水宮枢 - FLOW GLOW]. (2024, November 9). 【初配信】ゴゴゴゴ、、#水宮枢初配信 #hololiveDEV_IS #FLOWGLOW [Video]. YouTube.
- ↑ crocospect [u/crocospect]. (2024, November 11). Flow Glow members are suffering from Youtube culling like what happened to ReGloss!! Three of them had reached 100k before and now had to redo it again, it's insane how this problem still exist for years without any fixes from Youtube.. [Website]. Reddit.
- ↑ Mizumiya, S. [Su Ch. 水宮枢 - FLOW GLOW]. (2024, November 23). 【収益化記念配信】歌枠リレー みんなありがとう✨！【hololiveDEV_IS／水宮枢】 [Video]. YouTube.
- ↑ Mizumiya, S. [Su Ch. 水宮枢 - FLOW GLOW]. (2024, December 12). 【メンバーシップ開設】雑談＆説明会！【FLOW GLOW 水宮枢】#hololivedev_is [Video]. YouTube.
- ↑ Mizumiya, S. [Su Ch. 水宮枢 - FLOW GLOW]. (2025, January 16). 【歌枠／karaoke】20万人耐久！話多めで歌う【水宮枢／FLOW GLOW】#hololiveDEV_IS [Video]. YouTube.
- ↑ hololive DEV_IS FLOW GLOW [hololive DEV_IS FLOW GLOW]. (2025, March 12). 【感謝】デビューから4か月！“FG流ラップテクニック”をさらけだせぇぇぇぇえ!!【#FGがラップ作るところ見てて】#FLOWGLOW [Video]. YouTube.
- ↑ Mizumiya, S. [Su Ch. 水宮枢 - FLOW GLOW]. (2025, June 7). 【歌枠 KARAOKE】縦型歌枠🩵【水宮枢／FLOW GLOW】#hololivedev_is [Video]. YouTube.
- ↑ Mizumiya, S. [@mizumiya_su]. (2025, June 7). みんな40万人ありがとう😭💙これからもすうのペースで頑張っていくね！沢山の方に見つけて貰えて嬉しい❕沢山歌ったアーカイブはこちらから⬇️ [Tweet]. Twitter.
- ↑ Mizumiya, S. [Su Ch. 水宮枢 - FLOW GLOW]. (2025, October 4). 【50万人耐久】雑談／歌枠KARAOKE 💙❕【水宮枢／ホロライブDEV_IS】 [Video]. YouTube.
- ↑ Mizumiya, S. [@mizumiya_su]. (2025, October 4). 50万人！！みんなありがとう…💙😭日々みんなに支えられてここまで来て皆にまだまだ返せれてないけど、これからもまったり楽しく皆と沢山の思い出を作れると嬉しいです…💙❕いつか皆にもたくさん返せる日が来る様に頑張るよ…💪！！ [Tweet]. Twitter.
- ↑ hololive production [hololive DEV_IS FLOW GLOW]. (2025, November 9). 【#FG1周年】超重大告知あり‼️愛され続けた1年間‼️あの頃に掲げた目標にちょっとは近づけた？ [Video]. YouTube.
- ↑ hololive production [@hololivetv]. (2024, November 7). ﾟ+☆｡┈┈┈┈┈┈┈┈┈┈✧˖° ㅤ #𝑭𝑳𝑶𝑾𝑮𝑳𝑶𝑾 ㅤㅤㅤポップアップ開催決定 ⌖꙳✧┈┈┈┈┈┈┈┈┈┈*✩⡱ FLOW GLOWのアジトがある #原宿 で デビュー記念ポップアップイベントを開催🎉✨ 限定ノベルティや特別イベントなど 気になる詳細は11/10(日) 20:00~ ユニット配信にて発表❣ 💚開催期間 11/13(水)～11/17(日) 💛場所 原宿八角館 ポップアップスペース [Tweet]. Twitter.
- ↑ Debut Confirmed for FLOW GLOW, a New Unit from hololive DEV_IS! [Post]. (2024, November 7). hololive.hololivepro.com.
- ↑ Mizumiya, S. [Su Ch. 水宮枢 - FLOW GLOW]. (2024, November 9). 【初配信】ゴゴゴゴ、、#水宮枢初配信 #hololiveDEV_IS #FLOWGLOW [Video]. YouTube.
- ↑ Mizumiya, S. [Su Ch. 水宮枢 - FLOW GLOW]. (2024, November 9). 【初配信】ゴゴゴゴ、、#水宮枢初配信 #hololiveDEV_IS #FLOWGLOW [Video]. YouTube.
- ↑ Mizumiya, S. [Su Ch. 水宮枢 - FLOW GLOW]. (2024, November 9). 【初配信】ゴゴゴゴ、、#水宮枢初配信 #hololiveDEV_IS #FLOWGLOW [Video]. YouTube.