Gwelu Os Gar (グウェル・オス・ガール) is a male Japanese Virtual YouTuber affiliated with NIJISANJI. He debuted alongside Shirayuki Tomoe and Fuwa Minato, forming a trio known as "Yaoukoku" (夜王国, lit. "Night Kingdom").
Gwelu is a dark skinned elf, with pointy ears and sharp facial structure. He carries around a blue microphone, and always wears sunglasses, apart from when he is in his alternate outfit. He has slicked back blackish-brown hair and his eyes are a bright orange. He wears a brown and orange suit with light pink lines printed vertically on it. He also has one mole right under his left eye, wears black nail polish, and has one ring on his left hand's middle finger, and one ring on his right hand's index finger.
Gwelu Os Gar made his YouTube debut on 30 November.
On 27 January, he debuted his 2.0 brushup of his Live2D model.
On 10 May, his YouTube channel reached 180,000 subscribers.
On 1 September, 00.00 JST, Gwelu started a muted endurance stream until he reached 1 million YouTube subscribers. He started the stream when his subscribers were about 220,000. His story got picked up by livedoor NEWS> and Yahoo!Japan News.
- Within 32 hours since he started the stream, about 30,000 people had subscribed to his channel
On 23 September, his YouTube channel reached 300,000 subscribers.
On 28 November, his YouTube channel reached 330,000 subscribers during 3D collab with "Yaoukoku".
- Yaoukoku (夜王国 Night Kingdom) - Gwelu Os Gar, Shirayuki Tomoe, and Fuwa Minato.
The three are debut mates.
- Pibi and Pou (ピビandポゥ) - Gwelu Os Gar and Fumi.
- Winning Run (ういにんグらん UininGuRan) - Gwelu Os Gar, Aiba Uiha, and Hayase Sou.
- Caps Lock - Gwelu, Fumi, and Levi Elipha.
- NIJISANJI Elf Assembly (にじさんじエルフ集会 NIJISANJI Elf Shuugo) - Gwelu Os Gar, Elu, and Hanabatake Chaika.
- NIJISANJI Commercial High School (にじさんじ商業高校 NIJISANJI Shougyou Koukou) - Gwelu Os Gar, Kenmochi Toya, and Maimoto Keisuke.
- Live 3 Siblings (ライフさんきょうだい Raifu San-kyoudai) - Gwelu Os Gar, Seto Miyako, and Aizono Manami.
- OiKaze (追い風 Tailwind) - Gwelu Os Gar, Yashiro Kizuku, Fuwa Minato, and Kaida Haru.
- Meshiagaru (メシアガール) - Gwelu Os Gar, Saegusa Akina, Mayuzumi Kai, and Fuwa Minato.
- Yorumi Fumi Doumo (ヨルミ・フミ・ドーモ) - Gwelu Os Gar, Yorumi Rena, Fumi, and Mayuzumi Kai.
- ACDC - Gwelu Os Gar, Fushimi Gaku, Ange Katrina, Levi Elipha, and Nui Sociere.
- Color: #F04B2D 
- He is already married in real life, and his wife gave birth to their first child on June 17, 2020.
- グウェル・オス・ガール / Gwelu Os Gar 【にじさんじ】 - YouTube channel
- Gwelu Os Gar's corporate profile on the official NIJISANJI website
- @Gwelu_os_gar - Official Twitter account
- グウェル・オス・ガール - Unofficial NIJISANJI Wiki
- Gwelu Os Gar [@Gwelu_os_gar]. (2021, September 1). 開始。チャンネル登録者100万人耐久配信 [Tweet]. Twitter.
- livedoornews. (2021, September 1). 【奮闘】登録100万人まで生配信のVTuber、配信開始時で登録者は“22万人” 配信をしているのは、にじさんじ所属のVTuberであるグウェル・オス・ガールさん。登録100万人達成するか、耐久用PCが壊れるまで配信を続けるという。 [Tweet]. Twitter.
- Gwelu Os Gar [@Gwelu_os_gar]. (2021, September 1). チャンネル登録25万人ありがとうございます！！ (たった1日で3万人増、誠にありがとうございます) [Tweet]. Twitter.
- Based on Ichikara's .link page