The Sound of Heroes TV Anime Casts Anan Furuya & Manaka Iwami

The official Twitter/X account for the ongoing original TV anime series SI-VIS: The Sound of Heroes has announced that two new cast members will be joining the show. The anime premiered in Japan on October 5, 2025, and will run for two consecutive cours.

The latest cast additions are Anan Furuya as Kyoya and Manaka Iwami as Nagi.

• ©2025 ハルモニアエンタテインメント

• ©2025 ハルモニアエンタテインメント

• ©2025 ハルモニアエンタテインメント

• ©2025 ハルモニアエンタテインメント

These new characters join the previously announced voice cast of the anime, which includes:

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• • Daisuke Namikawa as YOSUKE
• • Ayane Sakura as Seiren
• • Nobunaga Shimazaki as Soji
• • Akari Kito as μ
• • Soma Saito as JUNE

Additionally, creditless versions of the opening and ending sequences for the anime have been released.

Daisuke Yoshida (Blue Exorcist: The Blue Night Saga) is helming the anime series, with Fumiaki Maruto (Saekano author) serving as the series screenwriter and scriptwriter. Character designs are by Naho Otsuki and Nami Fujii, while Hidari is responsible for the original character design. Animation production is being handled by Studio VOLN. SI-VIS: The Sound of Heroes was officially unveiled in July 2025 and is a collaboration between Aniplex and Sony Music; Aniplex is a subsidiary of Sony Music Entertainment.

©2025 ハルモニアエンタテインメント

Crunchyroll is streaming SI-VIS: The Sound of Heroes worldwide, summarizing the main plot as follows:
SI-VIS is a co-ed music group led by YOSUKE, who are shaking up the global music scene with their remarkable vocals and performances. However, they are actually heroes in disguise, battling mysterious forces that threaten the world. They harness audience energy during live performances to boost their combat power, with their battles appearing as ordinary concerts to the public, thus keeping their true identities a secret.

Sources: SI-VIS: The Sounds of Heroes Official Twitter (2), Anime News Network, Comic Natalie