Before venturing as a voice actress, Kobayashi worked as a model for magazines. In 2003, she auditioned for the role of Setsuna Sakurazaki in Negima! Magister Negi Magi, beginning her career as a voice actress. In 2007, she made her debut as a singer with the single Sora no Kotoba, which was the second closing theme of the Saint October anime. In 2008, she was nominated for "Best New Actress" at the second edition of the Seiyū Awards. Also in that same year, she released her first album YOU&YU and her first mini-album, ROCK YOU!!. Later, in 2010, she created the musical group Crush Tears.
On August 1, 2012, Rakugo CD "Moouchi!" is released. On December 29, 2017, she announced her marriage on her
Twitter account.[2]
^"つよきす - interview-". Archived from the original on July 2, 2006. Retrieved April 25, 2021.{{
cite web}}: CS1 maint: bot: original URL status unknown (
link)
^"『うみねこのなく頃に』追加キャスト発表!" ["Umineko no Naku Koro ni" additional cast announced!]. Animate Times (in Japanese). December 24, 2008. Retrieved April 24, 2021.
^"あにてれ:イナズマイレブンGO". Archived from the original on May 1, 2011. Retrieved April 25, 2021.{{
cite web}}: CS1 maint: bot: original URL status unknown (
link)
^"男子高校生の日常|スタッフ・キャスト". Daily Lives of High School Boys official anime site at TV Tokyo (in Japanese).
TV Tokyo. Retrieved April 25, 2021.
^"銀河へキックオフ | NHKアニメワールド". Ginga e Kickoff!! official anime site at NHK (in Japanese).
NHK. Retrieved April 25, 2021.
^"アニメ「神様はじめました(1期・2期)」の動画を今すぐ全話無料視聴できる公式動画配信サービスまとめ!" [Summary of official video distribution service that allows you to watch all episodes of the animation "Kamisama Kiss (1st and 2nd term)" for free right now!]. Mynavi News (in Japanese). April 5, 2021. Archived from
the original on April 25, 2021. Retrieved April 25, 2021.
^"「魔弾の王と戦姫」に上坂すみれ、井口裕香らの参加が発表!" [Sumire Uesaka, Yuka Iguchi and others have announced their participation in "Lord Marksman and Vanadis"!]. eiga.com (in Japanese). August 23, 2014. Retrieved April 25, 2021.
^"TVアニメ「血液型くん!」公式サイト". Archived from the original on October 8, 2015. Retrieved April 25, 2021.{{
cite web}}: CS1 maint: bot: original URL status unknown (
link)
^"TVアニメ『魔法つかいプリキュア!』、第3話の先行場面カットを紹介" [TV anime "Witchy PreCure!", Introducing the preceding scene cut of the third episode]. Mynavi News (in Japanese). February 20, 2016. Retrieved April 25, 2021.
^"「タイガーマスクW」ミスターXは初代と同じく柴田秀勝!小林ゆう、島田敏も出演" ["Tiger Mask W" Mr. X is Hidekatsu Shibata like the first generation! Yu Kobayashi and Bin Shimada also appear]. Natalie (in Japanese). September 13, 2016. Retrieved April 25, 2021.
^"囚人&看守による獄中アニメ「ナンバカ」に豊永利行、小林ゆう、細谷佳正ら出演決定" [Toshiyuki Toyonaga, Yu Kobayashi, Yoshimasa Hosoya and others will appear in the prisoner and jailer anime "Nanbaka"]. anime.eiga.com (in Japanese). August 8, 2016. Retrieved April 25, 2021.
^"「シュタインズ・ゲート ゼロ」公式サイトオープン! 新キービジュアル&アニメキャラ設定公開!" ["Steins; Gate 0" official website opened! New key visual & anime character settings released!]. Super! Animedia (in Japanese). February 6, 2018. Retrieved April 25, 2021.
^"いつだってMYサンタ!". Archived from the original on June 18, 2007. Retrieved April 25, 2021.{{
cite web}}: CS1 maint: bot: original URL status unknown (
link)
^"劇場版 「どうぶつの森」|キャスト". Archived from the original on October 19, 2007. Retrieved April 25, 2021.{{
cite web}}: CS1 maint: bot: original URL status unknown (
link)
^"『劇場版銀魂 完結篇』京成ローザ10 舞台挨拶公式レポ" ["Theatrical version Gintama Complete Edition" Keisei Rosa 10 Stage Greeting Official Report]. OKMusic (in Japanese). July 21, 2013. Retrieved April 25, 2021.
^"PS Vita「オメガラビリンス」生徒会の"乳"キャラクター2人が公開!ダンジョンでは下着を拾って進む!?" [Two "milk" characters from the PS Vita "Omega Labyrinth" student organization have been released! Pick up your underwear in the dungeon! ??]. Gamer (in Japanese). September 3, 2015. Retrieved April 26, 2021.
^"シリーズ20年の集大成『バイオハザード7』日本語ボイス版の出演声優が判明!完成披露の会場を様々な趣向で恐怖のどん底に突き落とす!" [The voice actors of the Japanese voice version of "Resident Evil 7", the culmination of 20 years in the series, have been revealed! Push the venue of the completion announcement to the bottom of fear with various tastes!]. Animate Times (in Japanese). January 25, 2017. Retrieved April 27, 2021.
^"『リーグ・オブ・レジェンド』日本語版の全吹き替え声優が初公開!【LoL10周年感謝祭】【UPDATE】" ["League of Legends" Japanese version of all dubbed voice actors unveiled for the first time! [LoL 10th Anniversary Thanksgiving] [UPDATE]]. Game*Spark (in Japanese). October 16, 2019. Retrieved April 26, 2021.
^日本初上陸!遭難した女子サッカーチームの狂気を描く新感覚サバイバル・サスペンスドラマ『イエロージャケッツ』日本語吹替版に本名陽子、田村ゆかり、小林ゆう、朴璐美、白石涼子ら豪華声優陣が集結。第1話をU-NEXT公式YouTubeにて無料公開! [First time in Japan! A new survival suspense drama about the madness of a women's soccer team in distress, Yellowjackets has been dubbed into Japanese by a star-studded cast of voice actors including Yōko Honna, Yukari Tamura, Yū Kobayashi, Romi Park, and Ryoko Shiraishi. The first episode is available for free on U-NEXT's official YouTube!] (Press release). U-NEXT. November 25, 2021.
Archived from the original on December 18, 2021. Retrieved December 19, 2021.
^【MIYAVI】11/20(土)17:00〜配信開始Netflixアニメ「Arcane」第三部に声優として出演! [Miyavi will appear as a voice actor in the third part of the Netflix anime Arcane, which will be distributed from 17:00 on Saturday, November 20!]. LDH News (in Japanese). November 20, 2021.
Archived from the original on January 4, 2022. Retrieved January 4, 2022.
^モービウス -日本語吹き替え版 [Morbius - Japanese-dubbed version]. Fukikaeru (in Japanese). April 1, 2022. Retrieved April 1, 2022.
^「ハケンアニメ!」劇中アニメに梶裕貴や高橋李依ら参加、実写パートに登場する声優も [Anime Supremacy! Yuki Kaji, Rie Takahashi, and other voice actors to appear in the live-action part of the anime]. Natalie. February 24, 2022.
Archived from the original on February 24, 2022. Retrieved February 24, 2022.
Before venturing as a voice actress, Kobayashi worked as a model for magazines. In 2003, she auditioned for the role of Setsuna Sakurazaki in Negima! Magister Negi Magi, beginning her career as a voice actress. In 2007, she made her debut as a singer with the single Sora no Kotoba, which was the second closing theme of the Saint October anime. In 2008, she was nominated for "Best New Actress" at the second edition of the Seiyū Awards. Also in that same year, she released her first album YOU&YU and her first mini-album, ROCK YOU!!. Later, in 2010, she created the musical group Crush Tears.
On August 1, 2012, Rakugo CD "Moouchi!" is released. On December 29, 2017, she announced her marriage on her
Twitter account.[2]
^"つよきす - interview-". Archived from the original on July 2, 2006. Retrieved April 25, 2021.{{
cite web}}: CS1 maint: bot: original URL status unknown (
link)
^"『うみねこのなく頃に』追加キャスト発表!" ["Umineko no Naku Koro ni" additional cast announced!]. Animate Times (in Japanese). December 24, 2008. Retrieved April 24, 2021.
^"あにてれ:イナズマイレブンGO". Archived from the original on May 1, 2011. Retrieved April 25, 2021.{{
cite web}}: CS1 maint: bot: original URL status unknown (
link)
^"男子高校生の日常|スタッフ・キャスト". Daily Lives of High School Boys official anime site at TV Tokyo (in Japanese).
TV Tokyo. Retrieved April 25, 2021.
^"銀河へキックオフ | NHKアニメワールド". Ginga e Kickoff!! official anime site at NHK (in Japanese).
NHK. Retrieved April 25, 2021.
^"アニメ「神様はじめました(1期・2期)」の動画を今すぐ全話無料視聴できる公式動画配信サービスまとめ!" [Summary of official video distribution service that allows you to watch all episodes of the animation "Kamisama Kiss (1st and 2nd term)" for free right now!]. Mynavi News (in Japanese). April 5, 2021. Archived from
the original on April 25, 2021. Retrieved April 25, 2021.
^"「魔弾の王と戦姫」に上坂すみれ、井口裕香らの参加が発表!" [Sumire Uesaka, Yuka Iguchi and others have announced their participation in "Lord Marksman and Vanadis"!]. eiga.com (in Japanese). August 23, 2014. Retrieved April 25, 2021.
^"TVアニメ「血液型くん!」公式サイト". Archived from the original on October 8, 2015. Retrieved April 25, 2021.{{
cite web}}: CS1 maint: bot: original URL status unknown (
link)
^"TVアニメ『魔法つかいプリキュア!』、第3話の先行場面カットを紹介" [TV anime "Witchy PreCure!", Introducing the preceding scene cut of the third episode]. Mynavi News (in Japanese). February 20, 2016. Retrieved April 25, 2021.
^"「タイガーマスクW」ミスターXは初代と同じく柴田秀勝!小林ゆう、島田敏も出演" ["Tiger Mask W" Mr. X is Hidekatsu Shibata like the first generation! Yu Kobayashi and Bin Shimada also appear]. Natalie (in Japanese). September 13, 2016. Retrieved April 25, 2021.
^"囚人&看守による獄中アニメ「ナンバカ」に豊永利行、小林ゆう、細谷佳正ら出演決定" [Toshiyuki Toyonaga, Yu Kobayashi, Yoshimasa Hosoya and others will appear in the prisoner and jailer anime "Nanbaka"]. anime.eiga.com (in Japanese). August 8, 2016. Retrieved April 25, 2021.
^"「シュタインズ・ゲート ゼロ」公式サイトオープン! 新キービジュアル&アニメキャラ設定公開!" ["Steins; Gate 0" official website opened! New key visual & anime character settings released!]. Super! Animedia (in Japanese). February 6, 2018. Retrieved April 25, 2021.
^"いつだってMYサンタ!". Archived from the original on June 18, 2007. Retrieved April 25, 2021.{{
cite web}}: CS1 maint: bot: original URL status unknown (
link)
^"劇場版 「どうぶつの森」|キャスト". Archived from the original on October 19, 2007. Retrieved April 25, 2021.{{
cite web}}: CS1 maint: bot: original URL status unknown (
link)
^"『劇場版銀魂 完結篇』京成ローザ10 舞台挨拶公式レポ" ["Theatrical version Gintama Complete Edition" Keisei Rosa 10 Stage Greeting Official Report]. OKMusic (in Japanese). July 21, 2013. Retrieved April 25, 2021.
^"PS Vita「オメガラビリンス」生徒会の"乳"キャラクター2人が公開!ダンジョンでは下着を拾って進む!?" [Two "milk" characters from the PS Vita "Omega Labyrinth" student organization have been released! Pick up your underwear in the dungeon! ??]. Gamer (in Japanese). September 3, 2015. Retrieved April 26, 2021.
^"シリーズ20年の集大成『バイオハザード7』日本語ボイス版の出演声優が判明!完成披露の会場を様々な趣向で恐怖のどん底に突き落とす!" [The voice actors of the Japanese voice version of "Resident Evil 7", the culmination of 20 years in the series, have been revealed! Push the venue of the completion announcement to the bottom of fear with various tastes!]. Animate Times (in Japanese). January 25, 2017. Retrieved April 27, 2021.
^"『リーグ・オブ・レジェンド』日本語版の全吹き替え声優が初公開!【LoL10周年感謝祭】【UPDATE】" ["League of Legends" Japanese version of all dubbed voice actors unveiled for the first time! [LoL 10th Anniversary Thanksgiving] [UPDATE]]. Game*Spark (in Japanese). October 16, 2019. Retrieved April 26, 2021.
^日本初上陸!遭難した女子サッカーチームの狂気を描く新感覚サバイバル・サスペンスドラマ『イエロージャケッツ』日本語吹替版に本名陽子、田村ゆかり、小林ゆう、朴璐美、白石涼子ら豪華声優陣が集結。第1話をU-NEXT公式YouTubeにて無料公開! [First time in Japan! A new survival suspense drama about the madness of a women's soccer team in distress, Yellowjackets has been dubbed into Japanese by a star-studded cast of voice actors including Yōko Honna, Yukari Tamura, Yū Kobayashi, Romi Park, and Ryoko Shiraishi. The first episode is available for free on U-NEXT's official YouTube!] (Press release). U-NEXT. November 25, 2021.
Archived from the original on December 18, 2021. Retrieved December 19, 2021.
^【MIYAVI】11/20(土)17:00〜配信開始Netflixアニメ「Arcane」第三部に声優として出演! [Miyavi will appear as a voice actor in the third part of the Netflix anime Arcane, which will be distributed from 17:00 on Saturday, November 20!]. LDH News (in Japanese). November 20, 2021.
Archived from the original on January 4, 2022. Retrieved January 4, 2022.
^モービウス -日本語吹き替え版 [Morbius - Japanese-dubbed version]. Fukikaeru (in Japanese). April 1, 2022. Retrieved April 1, 2022.
^「ハケンアニメ!」劇中アニメに梶裕貴や高橋李依ら参加、実写パートに登場する声優も [Anime Supremacy! Yuki Kaji, Rie Takahashi, and other voice actors to appear in the live-action part of the anime]. Natalie. February 24, 2022.
Archived from the original on February 24, 2022. Retrieved February 24, 2022.