I've Been Killing Slimes for 300 Years and Maxed Out My Level We Beat Up a Demon King (Season 1, Episode 7)
TV Episode | Animation, Action, Adventure

Primary photo for We Beat Up a Demon King

I've Been Killing Slimes for 300 Years and Maxed Out My Level

We Beat Up a Demon King (Season 1, Episode 7)

TV Episode | Animation, Action, Adventure

Halkara's knack for inadvertently causing trouble led her to knock out the Demon King Pecora, and now she's locked in a dungeon.

Directors

Nobukage Kimura | Shinichi Omata (as Mamoru Hatakeyama) | Kiyotaka Suzuki (opening)

Writers

Morita Kisetsu (creator: based on light novel by) (light novel) | Tatsuya Takahashi (screenplay)

Producers

Yoshinori Hasegawa | Yûichi Izumi (as Izumi Yuuichi) | Morita Jun | Yutaka Kashiwagi & 8 more

Composer

Keiji Inai

Cinematographer

Sôta Mikami (as Sota Mikami)

Editor

Hiroshi Okuda

See all filmmakers & crew (50)

Edit Released

Updated May 22, 2021

Release date

May 22, 2021 (Japan)

Contacts

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Cast	+ Add Cast
24 cast members

Name	Known for
Aoi Yûki Azusa Aizawa Azusa Aizawa See fewer	Your Name. (2016)
Manami Numakura Beelzebub Beelzebub See fewer	Dr. Stone (2019)
Sayaka Senbongi Falfa Falfa See fewer	Demon Slayer: Kimetsu no Yaiba - The Movie: Mugen Train (2020)
Azumi Waki Flatorte (voice) Flatorte (voice) See fewer	Fate/Grand Order (2015)
Sayaka Harada Halkara (voice) Halkara (voice) See fewer	A.I.C.O. Incarnation (2018)
Kaede Hondo Laika (voice) Laika (voice) See fewer	Demon Slayer: Kimetsu no Yaiba- The Movie - Infinity Castle (2025)
Yukari Tamura Pecora (voice) Pecora (voice) See fewer	Steins;Gate (2011)
Riho Sugiyama Rosalie (voice) Rosalie (voice) See fewer	Wave, Listen to Me! (2020)
Minami Tanaka Shalsha (voice) Shalsha (voice) See fewer	Hitoribocchi no Marumaruseikatsu (2019)
Corina Boettger Pecora (voice) (version: English) Pecora (voice) (version: English) See fewer	Genshin Impact (2020)
Allegra Clark Vania (voice) Vania (voice) See fewer	Apex Legends (2019)
Amber Lee Connors Flatorte (voice) (version: English) Flatorte (voice) (version: English) See fewer	Guilty Gear: Strive (2021)
Skyler Davenport Azusa Aizawa Azusa Aizawa See fewer	Dissidia Final Fantasy NT (2018)
Rachelle Heger Laika Laika See fewer	Fire Emblem: Engage (2023)
Xanthe Huynh Halkara Halkara See fewer	Persona 5 (2016)
Miku Itou Fatla (voice) Fatla (voice) See fewer	Kamen Rider Jeanne & Kamen Rider Aguilera with Girls Remix (2022)
Erica Mendez Beelzebub (voice) (version: English) Beelzebub (voice) (version: English) See fewer	Aggretsuko (2018)
Ari Ozawa Vania (voice) Vania (voice) See fewer	Active Raid (2016)
Masaya Sakai Demon Official Demon Official See fewer	I've Been Killing Slimes for 300 Years and Maxed Out My Level (2021)
Shin'ya Takahashi Demon Official (as Shinya Takahashi) Demon Official (as Shinya Takahashi) See fewer	Demon Slayer: Kimetsu no Yaiba - The Movie: Mugen Train (2020)
Veronica Taylor Fatla (voice) (version: English) Fatla (voice) (version: English) See fewer	Pokémon: The First Movie - Mewtwo Strikes Back (1998)
Kohei Yanagi Demon Official Demon Official See fewer	Rurouni Kenshin (2023)
Anne Yatco Rosalie (voice) (version: English) Rosalie (voice) (version: English) See fewer	Genshin Impact (2020)
Suzie Yeung Shalsha (voice) (version: English) Shalsha (voice) (version: English) See fewer	Final Fantasy VII Remake: Episode Intermission (2021)