Aniplex announced Ryōhei Kimura is joining the cast of the Secrets of the Silent Witch anime series as Elliott Howard. The anime series will premiere in July 2025.

The cast of the Secrets of the Silent Witch anime also 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
Takaomi Kanasaki is the chief director, scriptwriter, and sound director of the anime, Yasuo Iwamoto is directing the anime series, 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. The most recent volume, volume 8, released on August 9. Tobi Tana launched a manga adaptation in July 2021.
Yen Press describes the first volume:
Monica Everett, the Silent Witch, is the only mage in the world who can use unchanted magecraft, a true hero who singlehandedly defeated a legendary black dragon. However, this young genius is actually…super-duper shy! That’s right: She learned to cast spells silently just to avoid speaking in public, and despite her power, she has zero self-confidence. Now Monica has been tasked with secretly guarding the second prince. Can she keep it together as she faces both the evil forces targeting the prince and the terrors of social interaction?