Aniplex announced the Secrets of the Silent Witch anime series will premiere on July 4, and the anime’s cast, theme song artist, and latest key visual were also revealed. hitsujibungaku performs the opening theme song (not named yet) and ending theme song “mild days.”

The cast of the Secrets of the Silent Witch anime series includes:
- Saya Aizawa as Monica Everett
- Hitomi Nabatame as Nero
- Junichi Suwabe as Louis Miller
- Atsumi Tanezaki as Isabel Norton
- Shōgo Sakata as Felix Arc Ridill
- Kanna Nakamura as Lana Colette
- Yoshiki Nakajima as Cyril Ashley
- Ryōhei Kimura as Elliott Howard
- Yuki Sakakihara as Neil Clay Maywood
- Yōko Hikasa as Bridget Greyham
- M.A.O as Rynzbelfeid
- Hina Suguta as Casey Groves
- Shunichi Toki as “???” (name to be revealed at a later date)
Takaomi Kanasaki is the chief director, scriptwriter, and sound director, Yasuo Iwamoto is the director, and studio Gokumi is producing the anime. Cona Nitanda is the animation character designer. Cygames and Rina Tayama are credited for the music.
Additional staff members include:
- Monster and Prop Designer: Yoshinori Iwanaga
- Art Directors: Eri Yamanashi and Yukiko Maruyama
- Color Setting: Saori Yoshida
- 3D CG Director: Kana Imagaki
- Director of Photography: Naoki Etō
- Editor: Kashiko Kimura
The original novels debuted on the Shōsetsuka ni Narō (Let’s Become Novelists) website in February 2020. Kadokawa started publishing the light novels in 2021, and Yen Press publishes the series in English. Tobi Tana launched a manga adaptation in July 2021.