Isekai Quartet
Isekai Quartet is a Japanese anime series that serves as a chibi-style crossover between the light novel series KonoSuba, Overlord, ', and The Saga of Tanya the Evil, all published by Kadokawa Corporation. The series aired its first season from April to June 2019. A second season aired from January to March 2020, including additional characters from The Rising of the Shield Hero and '. A third season has been announced.
Plot
One day, a magic button suddenly appears. The protagonists from KonoSuba, Overlord, ', and The Saga of Tanya the Evil all press the button occasionally, unintentionally and move to a parallel world — another brand new isekai — where a new story featuring high school life begins. Soon, they are joined by protagonists from The Rising of the Shield Hero and '.Characters
| Series | Character | Japanese | English |
| KonoSuba | Kazuma Satou | Jun Fukushima | Arnie Pantoja |
| KonoSuba | Aqua | Sora Amamiya | Faye Mata |
| KonoSuba | Megumin | Rie Takahashi | Erica Mendez |
| KonoSuba | Darkness | Ai Kayano | Cristina Vee |
| KonoSuba | Chris | Ayaka Suwa | Kira Buckland |
| KonoSuba | Vanir | Masakazu Nishida | Anthony Bowling |
| KonoSuba | Yunyun | Aki Toyosaki | Kayli Mills |
| KonoSuba | Chomusuke | Hitomi Nabatame | Ryan Bartley |
| KonoSuba | Wiz | Yui Horie | Brianna Knickerbocker |
| KonoSuba | Ruffian | Tetsu Inada | Jeremy Inman |
| Overlord | Ainz Ooal Gown | Satoshi Hino | Chris Guerrero |
| Overlord | Albedo | Yumi Hara | Elizabeth Maxwell |
| Overlord | Shalltear Bloodfallen | Sumire Uesaka | Felecia Angelle |
| Overlord | Aura Bella Fiora | Emiri Katō | Jill Harris |
| Overlord | Mare Bello Fiore | Yumi Uchiyama | Megan Shipman |
| Overlord | Demiurge | Masayuki Katō | Jeff Johnson |
| Overlord | Cocytus | Kenta Miyake | Bryan Massey |
| Overlord | Hamsuke | Akeno Watanabe | Heather Walker |
| Overlord | Yuri Alpha | Hiromi Igarashi | Whitney Rodgers |
| Overlord | Lupusregina Beta | Mikako Komatsu | Alexis Tipton |
| Overlord | Narberal Gamma | Manami Numakura | Anastasia Muñoz |
| Overlord | CZ2128 Delta | Asami Seto | Michelle Rojas |
| Overlord | Solution Epsilon | Ayane Sakura | Mallorie Rodak |
| Overlord | Entoma Vasilissa Zeta | Kei Shindō | Tia Ballard |
| Overlord | Pandora's Actor | Mamoru Miyano | Eric Vale |
| Overlord | Sebas Tian | Shigeru Chiba | Bill Jenkins |
| Overlord | Kyouhukou | Hiroshi Kamiya | John Swasey |
| ' | Subaru Natsuki | Yūsuke Kobayashi | Sean Chiplock |
| ' | Emilia | Rie Takahashi | Kayli Mills |
| ' | Puck | Yumi Uchiyama | Erica Mendez |
| ' | Rem | Inori Minase | Brianna Knickerbocker |
| ' | Ram | Rie Murakawa | Ryan Bartley |
| ' | Beatrice | Satomi Arai | Kira Buckland |
| ' | Roswaal L. Mathers | Takehito Koyasu | Ray Chase |
| ' | Felt | Chinatsu Akasaki | Christine Marie Cabanos |
| ' | Reinhard van Astrea | Yuichi Nakamura | Robbie Daymond |
| ' | Julius Euclius | Takuya Eguchi | Chris Niosi |
| ' | Wilhelm van Astrea | Kenyu Horiuchi | Barry Yandell |
| ' | Petelgeuse Romanee-Conti | Yoshitsugu Matsuoka | Todd Haberkorn |
| The Saga of Tanya the Evil | Tanya von Degurechaff | Aoi Yūki | Monica Rial |
| The Saga of Tanya the Evil | Viktoriya Ivanovna Serebryakov | Saori Hayami | Jeannie Tirado |
| The Saga of Tanya the Evil | Matheus Johann Weiss | Daiki Hamano | Daman Mills |
| The Saga of Tanya the Evil | Vooren Grantz | Yūsuke Kobayashi | Jeff Johnson |
| The Saga of Tanya the Evil | Wilibald Koenig | Jun Kasama | Chris Wehkamp |
| The Saga of Tanya the Evil | Rhiner Neumann | Daichi Hayashi | Ben Phillips |
| The Saga of Tanya the Evil | Erich von Rerugen | Shinichiro Miki | J. Michael Tatum |
| The Saga of Tanya the Evil | Kurt von Rudersdorf | Tesshō Genda | Greg Dulcie |
| The Saga of Tanya the Evil | Hans von Zettour | Hōchū Ōtsuka | Mark Stoddard |
| The Saga of Tanya the Evil | Adelheid von Schugel | Nobuo Tobita | Charlie Campbell |
| The Rising of the Shield Hero | Naofumi Iwatani | Kaito Ishikawa | Billy Kametz |
| The Rising of the Shield Hero | Raphtalia | Asami Seto | Erica Mendez |
| The Rising of the Shield Hero | Filo | Rina Hidaka | Brianna Knickerbocker |
| ' | Seiya Ryuguin | Yūichirō Umehara | Anthony Bowling |
| ' | Ristarte | Aki Toyosaki | Jamie Marchi |
Production and release
The series is written and directed by Minoru Ashina, with character designs by Minoru Takehara, who also serves as chief animation director. The series is animated by Studio Puyukai. It aired from April 9 to June 25, 2019. The series ran 12 episodes. Funimation has licensed the series and is streaming it in both Japanese and English. On April 23, 2019, it was added to Crunchyroll's streaming library as well. Satoshi Hino, Jun Fukushima, Yūsuke Kobayashi and Aoi Yūki perform the opening theme song "Isekai Quartet", while Yumi Hara, Sora Amamiya, Rie Takahashi and Aoi Yūki perform the ending theme song "Isekai Girls Talk".A second season of the anime series was announced at the ending of Episode 12 and premiered on January 14, 2020. The main staff members returned to reprise their roles. The season includes guest appearances of characters from The Rising of the Shield Hero. Hino, Fukushima, Kobayashi and Yūki perform the second season's opening theme song "Isekai Showtime", while Sumire Uesaka, Rie Takahashi, Inori Minase, and Saori Hayami perform the second season's ending theme song, "Ponkotsu! Isekai Theater". The second season ran for 12 episodes. Funimation has licensed the series for a simuldub. Crunchyroll is also streaming the second season. Muse Communication is streaming the second season in Southeast Asia.
A third season of the anime series was announced at the ending of the second season's final episode.