The highly anticipated original TV anime, SI-VIS: The Sound of Heroes, has released a new teaser video featuring an insert song, alongside a reveal of additional key staff members. The “Music x Hero” themed series, a collaboration between Aniplex and Sony Music, is slated to premiere on Fuji TV and other networks in Japan on October 5, 2025, at 9:30 a.m. JST, with Crunchyroll set to stream the series worldwide outside of Asia.
The newly unveiled teaser provides a glimpse into the anime’s unique blend of musical performance and heroic battles, further building anticipation for its fall debut.
A Deeper Look at the “Music x Hero” Narrative
SI-VIS: The Sound of Heroes centers on a co-ed vocal unit named SI-VIS, who have achieved global popularity through their exceptional vocals and performances. However, their public persona as entertainers conceals a crucial secret: they are actually heroes battling a mysterious calamity threatening the world. Their live concerts serve as hidden battlegrounds, where the energy generated from their captivated audience is converted into the power they need to fight. The public remains unaware of their true, heroic identities, perceiving the intense battles as nothing more than thrilling performances.
The Premise: Music as a Weapon
The core concept of “Music x Hero” drives the series, with the vocal talents of the in-show unit SI-VIS being provided by vocalists selected from Sony Music. Further details about these specific vocal artists are expected to be revealed at a later date. The tagline on a previous teaser visual emphasized this theme: “Artist heroes who save the world through music are born (debut).”
Expanding the Creative Team: New Staff Revealed
Beyond the previously announced core staff, several new names have joined the production team, promising a robust creative vision for SI-VIS: The Sound of Heroes.
Key Staff and Their Contributions
Fumiaki Maruto, known for his work on Saekano: How to Raise a Boring Girlfriend, is overseeing and writing the series scripts, ensuring a compelling narrative. Original character designs are handled by Hidari, whose past credits include Fractale and Fire Emblem Echoes: Shadows of Valentia.
The newly announced staff members include:
- Director: Daisuke Yoshida
- Character Designers: Nao Ohtsuki and Nami Fujii
- Sub-Character Designers: Mika Takahashi and Masahiro Yamanaka
- Monster Design: Tomohisa Onoue
- Chief Animation Director: Yurie Ohto
- Action Animation Director: Takaaki Hirayama
- Art Director: Takao Makino
- Color Design: Yoshinori Horikawa
- Director of Photography: [Name not fully available in snippets, but position confirmed]
This expanded team highlights a comprehensive approach to the anime’s visual and narrative execution.
The Voice Cast Bringing Heroes to Life
The main voice cast for the SI-VIS unit was previously announced, featuring a lineup of experienced voice actors:
- YOSUKE (Leader): Daisuke Namikawa
- Siren: Ayane Sakura
- μ (Myu): Akari Kito
- Soji: Nobunaga Shimazaki
- JUNE: Soma Saito
These talented seiyuu will lend their voices to the dual roles of popular musicians and world-saving heroes.
Anticipation Builds for October Premiere
With the release of the new teaser, the revelation of an insert song, and the announcement of additional staff, SI-VIS: The Sound of Heroes is steadily gearing up for its October 2025 premiere. The unique blend of music and superhero action, coupled with a strong creative team and cast, positions it as a series to watch in the upcoming anime season. Fans can look forward to Crunchyroll streaming the series globally, ensuring widespread access to this original “Music x Hero” narrative.
