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Kageyama Shien (影山シエン) is a male Japanese Virtual YouTuber endorsed by hololive's branch holostars. He is a member of its third generation alongside Aragami Oga, which was previously known as "TriNero" (トライネロ) prior to Tsukishita Kaoru's retirement. Shien and Oga then became known as "MaFia" (魔フィア).[2]

Introduction Video


【初配信】初めましてだ、影山シエン初陣!【ホロスターズ3期生 新人Vtuber】

Shien's debut stream.

The mafia boss from the land of beastmen.

He came to our world to search for his missing best friend. He was scouted by Shinove after coming to a standstill in his search.
He acts tougher than he really is, but doesn't have the talent to be truly evil.[3]
A mafia boss from the land of beastmen.

Came to our world in search of his missing best friend.

Was scouted by Shinove after coming to a standstill in his search.

Acts tougher than he really is but doesn't have the talent to be truly evil.[4]


Shien is a jackal that sometimes can be quite dumb and naive, baby-like, even. Former TriNero member Tsukishita Kaoru described him as a man that misuses his handsome voice, and "if a bat maker gave him the world's best baseball bat, he'd use it for soccer".[5] Additionally, Aragami Oga, another member of TriNero, states that despite him being a mafia boss, he can't do anything without his subordinates. He further states that despite having good ears, he doesn't seem to listen to anyone.[6]



His Twitter account was created in 10 April 2020; he made his first tweet on 27 April, his YouTube channel was created on 8 April, and his debut stream was performed on 30 April.


Shortly after his debut, his Twitter account was suspended because of his birth year being set to 2020. On 2 June, the Twitter suspension was lifted.[7]

On 16 August, he released a cover of Fire◎Flower by halyosy, in which he sang with Rikka, Kanade Izuru and Astel Leda, making it his first cover song.[8]

On 27 September, he released his first solo cover song, KING by Kanaria.[9]

On 25 December, it was announced that all the holostars members would receive new costumes on 3 January, 2021, commemorating New Year's.[10]


On January 3, he revealed his new year's costume,[11] which was modelled by Klaeia.[12]

On 9 January, he opened his membership feature.[13]

On March 20, Shien reached 100.000 subscribers, being the third holostars member to reach this milestone.[14]

On 7 July, Shien announced during a stream that he would receive his 3D model.[15]

On 10 July, Shien debuted his 3D model.[16]

On 13 July, hololive's Japanese Twitter account announced that every holostars member would get 2.0 version of their 2D model.[17]

On 6 August, hololive's Japanese Twitter announced that Shien and Oga would receive "Summer" costumes.[18]

On 10 August, Shien debuted his Summer costume.[19]


Main page: Kageyama Shien/Discography
Just Follow Stars as HOLOSTARS commemorating the group's 2nd anniversary 28 June 2021    
  1. "Just Follow Stars"
  2. "Just Follow Stars" (instrumental)
Just Follow Stars Cover.png
External links
Digital Release • Music Video • YouTube
Pentas as HOLOSTARS 1 December 2021    
  1. "Pentas"
  2. "Pentas" (instrumental)
Holostars - Pentas Cover.jpg
External links
Digital Release • Music Video • YouTube



On 2 August, Shien entered Shibuya Hal's VTuber Apex Legends Tournament alongside Hanasaki Miyabi and Rikka under their group name "Star☆Sweeper". In the final rankings, they ranked 20th place.

On 10 October, Shien was a part of Waku Waku! VTuber Hiroba Online Vol. 2 (わくわく!VTuberひろば おんらいん Vol.2) along with Aragami Oga, Syukusei Batumaru and Boyacky from Yatterman Channel.[20] Fellow holostars member Rikka and, as well as Nanase Taku, Akiyama Rentarou from Himashokudo and Hanagasa Ilya were also part of the event.

On 26 October, it was announced that holostars goods would be sold at Animate Girls Festival Aozora Marche, held on November 7-8, 2020,[21] and on 28 October, 2020, it was announced that holostars would be participating in the event as guests.[22] Shien is part of the "Virtual Clerk" (バーチャル店員) exhibition, the "Anibako" (アニバコ) program and the "Chatting Fes" (おしゃべりフェス) exhibition in the event.[23]


On 28 January, it was announced that "Net Talking Festival", an holostars exclusive event, will be held on 14 February where fans can have a one-on-one chat with any of the holostars members for 3 minutes, talking about their daily feelings of gratitude to an important person.[24]

From 25 until 27 June, all holostars members participated in their 2nd anniversary event "Our Rally 2021", the event featured 3 holostars in each day of the event, Shien participated on the 3rd day.[25] On the final day of the event, an original song Just Follow Stars was released on the official holostars channel featuring all members singing.

On 22 July 2021, Shien participated on the Fall Guys tournament VTuber Fall Guys Sports Day with fellow holostars members; Hanasaki Miyabi, Arurandeisu and Aragami Oga as "Crustacean LobStars". In the final rankings, they ranked 1st place.[26]

On 15 October, holostars' Twitter account announced that holostars would participate in "Animate Girls Festival 2021."[27]

Mascot and Fans

  • Shien's mascot is a cat named "Nekoyama Shien" (猫山シエン), which was drawn by Aragami Oga.[28]
  • Shien also has two minions, "Koyama" (小山) and "Nakayama" (中山).[29]
  • His fanbase is officially called "Shiengumi" (シエン組), although he usually calls his fans his "subordinates" (部下たち).
  • After Shien says his opening greeting (お前たち,任務開始だ!), fans reply with "yes boss!" (イエスボス!).
  • When Shien ends the stream, fans say farewell by saying "good luck!" (グッドラック!).


  • Units and groups aside from TriNero and MaFia he is part of are:
    • "Star☆Sweeper" (スター☆スウィーパー), along with Hanasaki Miyabi and Rikka.
    • "Babudon" (ばぶどん), along with Yukoku Roberu.
    • "Babumagadokide" (ばぶ魔ヶ刻で), along with Aragami Oga and Yukoku Roberu.
    • "Shadowgear" (シャドウギア), along with Rikka.
    • "TsukiKageRiTem" (月影律天), along with Tsukishita Kaoru, Rikka and Kishido Temma.
    • "Entenka" (円天家​), along with Kishido Temma.[30]
    • "Shikaku" (シカく), along with Kazami Kuku and Hanayura Kanon.
    • "Koukakidou Lobstars" (甲殻奇動ロブスターズ), along with Hanasaki Miyabi, Arurandeisu and Aragami Oga.


  • He likes anmitsu, as well as omurice.
  • He dislikes oysters.
  • His favorite animal is the kuroshiba.
  • In the process of creating TriNero's Twitter accounts, they were cautioned seriously by Daidou Shinove, holostars' manager, and mentioned that they had to be careful with the birthday settings, as your account would get locked if you were underage. Aragami Oga joked that because they debut in 2020, that would also be their birth year, which may have caused Shien to set 2020 as his birth year, thus causing his Twitter suspension.[6]
    • Shien's Twitter suspension has caused jokes between fans, saying that he was baby, as if he was born in 2020. Notable examples of the joke was when Shirakami Fubuki drew Shien as a baby, Aragami Oga displaying Shien with a pacifier in his mouth, as well as calling him a "babbling baby" in his debut stream, and Tsukishita Kaoru making Shien's drink a baby bottle in the first TriNero collab.
    • Along with that, because his Twitter was suspended, he couldn't set up his official fan mark, but the official holostars Twitter confirmed that "🟣", a purple circle, was his fan mark, shown in schedules. However, fans used "🍼", a baby bottle, as an unofficial fan mark as part of the joke.
    • Ironically, he is lactose intolerant.[31]
  • Fans have stated how Shien's voice is very similar to that of voice actor Takahiro Sakurai's. Shien has even done some impressions of characters Sakurai has voiced, for example, Lucio from Granblue Fantasy[32].
  • His fetish is asses without thigh gaps, as when the legs are closed, it jiggles due to the "fleshiness".[33]
  • One of Shien's running gags is him using an echo filter on his mic, often at abrupt times.
  • He shares the same character designer with Shirayuki Tomoe from Nijisanji.
    • Because of this, he calls Tomoe "Ane-san" (姐さん).[34]
  • He owns a toy sword called DX Kageyama Blade (DX影山刀) that comes with various voice lines, voiced by himself. Some of the voice lines include his stream greeting and ending lines as well as original special attack names.[35]
  • Sometimes new viewers mistake him as a dog, cat or even a skunk.
  • During his birthday stream, he revealed that when he hit around 20 years old, he went drinking without knowing his alcohol tolerance. He merrily went to an izakaya, had six cocktails of Kahlua Milk and vomitted so much he puked blood soon after, causing the realization that he can't drink, only able to do so moderately.[36]
  • During the aftermath of the VTuber Fall Guys Party tournament, Team Lobstars had considered doing a 3D Fall Guys of some sort after they all get their 3D.
  • In Shien's one year anniversary stream, he mentioned that within just one year they lost 3 out of 12 holostars members. Even though it's just currently the 9 of them, they're all working very hard. Further stating that from time to time, he'll see comments asking for a 4th generation already and understanding that people are hyped for new things. However, Shien noted that they aren't some gacha pulls but real people with feelings. To be clear, he is not against new members but ask that everyone support the current 9 members that are here now.[37]
    • Rikka had also stopped by the stream and commented that in their hearts they are always 12 members and Shien agreed cementing the statement to be true as they'll never forget.
  • In a Minecraft stream while talking to viewers, Miyabi revealed that Shien doesn't act any different indicating his personality is the same whether when streaming or not streaming.[38]
  • Shien said in a stream that during an off collab where everyone met and went out to eat, they were having serious talks regarding how holostars would be moving forward in the future. Izuru, who was seating near him and after hearing Izuru's heartful response, it moved him so he ended up giving Izuru a head pat.[39]
    • Shien brought it up again in a different stream collab with Izuru where he noted for having gave Izuru head pats because he couldn't help himself since Izuru was so cute in his response.[40]

External Links


Twitter hashtags

Further readings

hololive logo
Solo Debutants
(hololive 0th Gen)
Tokino Sora (🐻) A-chan and Ankimo · Roboco-san (🤖) · Sakura Miko (🌸) · Hoshimachi Suisei (☄️) · AZKi (⚒️)
1st Generation Yozora Mel (🌟) · Aki Rosenthal (🍎) · Natsuiro Matsuri (🏮) · Shirakami Fubuki (🌽) · Akai Haato (❣️)
Retired Hitomi Chris (🌰)
2nd Generation Minato Aqua (⚓️) · Murasaki Shion (🌙) · Nakiri Ayame (👿) · Yuzuki Choco (🍫💋) · Oozora Subaru (🚑)
hololive GAMERS Shirakami Fubuki (🌽) · Ookami Mio (🌲) · Nekomata Okayu (🍙) · Inugami Korone (🥐)
3rd Generation
(hololive Fantasy)
Usada Pekora (👯) · Uruha Rushia (🦋) · Shiranui Flare (🔥) · Shirogane Noel (⚔️) · Houshou Marine (🏴‍☠️)
4th Generation Tsunomaki Watame (🐏) · Tokoyami Towa (👾) · Amane Kanata (💫) · Himemori Luna (🍬)
Retired Kiryu Coco (🐉)
5th Generation
Yukihana Lamy (☃️) · Momosuzu Nene (🥟) · Shishiro Botan (♌) · Omaru Polka (🎪)
Retired Mano Aloe (👅)
6th Generation
La+ Darknesss(🛸💜) · Takane Lui (🥀) · Hakui Koyori (🧪) · Sakamata Chloe(🎣) · Kazama Iroha (🍃)
INNK logo
Member AZKi (⚒️)
hololive IN logo
1st Generation Airani Iofifteen (🎨) · Moona Hoshinova (🔮) · Ayunda Risu (🐿️)
2nd Generation Kureiji Ollie (🧟‍♀️) · Anya Melfissa (🍂) · Pavolia Reine (🦚)
hololive EN logo
1st Generation
-Myth- or holoMyth
Ninomae Ina'nis (🐙) · Takanashi Kiara (🐔) · Watson Amelia (🔎) · Mori Calliope (💀) · Gawr Gura (🔱)
Project: HOPE IRyS (💎)
2nd Generation
Tsukumo Sana (🪐) · Ceres Fauna (🌿) · Ouro Kronii (⏳) · Nanashi Mumei (🪶) · Hakos Baelz (🎲)
hololive CN logo
(Dissolved Branch)
1st Generation Yogiri (🍼🎸) · Civia (🌙🦄) · Spade Echo (🍑) Everyone retired
2nd Generation Rosalyn (📖) · Doris (🐟) · Artia (❄️) Everyone retired
Holostars logo
1st Generation Hanasaki Miyabi (🌺) · Kanade Izuru (🎸) · Arurandeisu (🍕) · Rikka (⚙️)
Retired Yakushiji Suzaku (💊) · Kagami Kira (💙)
2nd Generation
Sun Tempo
Astel Leda (🎭) · Kishido Temma (🦔💨) · Yukoku Roberu (🍷)
3rd Generation
Kageyama Shien (🟣) · Aragami Oga (🐃)
Retired Tsukishita Kaoru (💅)


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  3. Profile on (n.d.).
  4. Profile on (n.d.).
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  8. Kageyama, S [Shien Ch.影山シエン]. (2020, August 16). 【歌ってみた】Fire◎Flower covered by HOLOSTARS【律可/イヅル/アステル/シエン】 [Video File]. YouTube.
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  16. Kageyama, S [Shien Ch.影山シエン]. (2021, July 10). 【#影山シエン3D】お前達、3Dお披露目開始だ!!!!!!【影山シエン/ホロスターズ】 [Video File]. YouTube.
  17. @hololivetv. (2021, July 7). 【🎉お知らせ🎉】 「ホロライブアプリ」において、「ホロスターズ」所属タレントのアップデートの実施が決定🙌✨ さらに表情が豊かとなった、彼らを楽しみにお待ちください😄 [Tweet]. Twitter.
  18. @hololivetv. (2021, August 6). 【🎉お知らせ🎉】 ホロスターズ3期生「#影山シエン」、「#荒咬オウガ」の2名による夏衣装お披露目リレーが、8月10日(火)20時より、それぞれのYouTubeチャンネルにて実施決定🥳✨ 🔽詳細はこちら🔽 [Tweet]. Twitter.
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  22. holostarstv. (2020, October 28). 【AGFブース情報】11/7~8開催「AGFあおぞらマルシェ」ホロスターズブースにて、VTuber体験アトラクションを展開致します✨ [Tweet]. Twitter.
  23. VTuber事務所「ホロスターズ」、「アニメイトガールズフェスティバルあおぞらマルシェ」ブース情報、グッズのラインナップなど詳細を発表! [Press Release]. (2020, November 5). PR TIMES.
  24. holostarstv. (2021, January 28). 【🎉お知らせ🎉】 男性VTuberグループ「#ホロスターズ」のメンバーと対面で話せるオンラインイベント「ネットおしゃべりフェス on バレンタイン ホロスターズ」が2月14日(日)開催決定‼ [Tweet]. Twitter.
  25. holostarstv. (2021, June 24). [1 Day To Go!📢] holostars' 2nd anniversary event "俺たちの決起集会2021" will take place tomorrow‼️ [Tweet]. Twitter.
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  30. Kageyama, S [Shien Ch.影山シエン]. (2020, December 23). 【Shadowverse】漢による漢の為のシャドバ、ここに【#円天家​】 [Video File]. YouTube.
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  40. Kageyama, S. [Shien Ch.影山シエン] (2021, June 10)【雑談コラボ】獣人とギター少年が喋るだけ【影山シエン/奏手イヅル】[Video File] Retrieved from