Sion Ulster in Wistoria: Wand and Sword is voiced by Masaaki Mizunaka in the Japanese version and Brandon Acosta in the English dub. Sion is described as a proud, arrogant, and fiery character, and both casting choices bring an intensity well suited to a figure who serves as one of the series’ more confrontational presences.
Masaaki Mizunaka (Japanese Voice Actor)
About Masaaki
Masaaki Mizunaka is a Japanese voice actor affiliated with the talent agency Atomic Monkey. He has built a steady presence in the anime industry over the course of the 2010s and 2020s, typically taking on roles that carry a sharp edge — characters who are competitive, proud, or driven by strong personal conviction. His vocal delivery tends toward a crisp, assertive tone that suits antagonistic or rivalry-driven characters well.
His role as Sion Ulster in Wistoria: Wand and Sword fits comfortably within that range. Sion is a brash, high-ranking magic user who looks down on those he considers beneath him, and Mizunaka’s ability to convey disdain and intensity without losing clarity of character makes him a natural fit for the role.
Career Highlights
- Sion Ulster – Wistoria: Wand and Sword
- Kizuku Higashira – I Want to Be a Wall
- Ikki Kurogane – Chivalry of a Failed Knight
- Eugene Salvarision – The Greatest Demon Lord Is Reborn as a Typical Nobody
Full Current Filmography
The following list reflects documented credits and may not be exhaustive.
Anime (Selected, Chronological Highlights)
- Ikki Kurogane – Chivalry of a Failed Knight (2015)
- Eugene Salvarision – The Greatest Demon Lord Is Reborn as a Typical Nobody (2022)
- Kizuku Higashira – I Want to Be a Wall (2024)
- Sion Ulster – Wistoria: Wand and Sword (2024)
Critical Reception
Mizunaka’s performance as Sion Ulster has been noted by viewers for capturing the character’s arrogance and underlying intensity. The series received generally positive coverage from anime outlets, with Anime News Network and community discussion on MyAnimeList reflecting appreciation for the vocal cast’s ability to bring Wistoria’s ensemble to life.
Brandon Acosta (English Voice Actor)
About Brandon
Brandon Acosta is an English-language voice actor known primarily for his work in anime dubbing produced through Crunchyroll. He has spoken publicly about the experience of voicing Sion Ulster, noting the challenge and appeal of moving away from more straightforward heroic roles to portray a brash, angry bully — a character whose mindset required a different kind of emotional engagement. His comments suggest a deliberate approach to understanding the psychology behind Sion’s behavior.
Acosta’s work on Wistoria: Wand and Sword represents one of his more prominent roles to date. The English dub of the series was produced by Crunchyroll, with voice direction handled by Jeremy Inman, and released on July 21, 2024 — shortly after the Japanese broadcast premiere on July 7, 2024.
Career Highlights
- Sion Ulster – Wistoria: Wand and Sword
Full Current Filmography
The following list reflects documented credits and may not be exhaustive.
Anime (Voice Acting)
- Kaiju No. 8 (2024)
- Sion Ulster – Wistoria: Wand and Sword (2024)
- Let’s Play (2025)
Critical Reception
Brandon Acosta’s portrayal of Sion Ulster in the English dub has drawn attention for the conviction he brings to a character who could easily read as one-dimensional. Community reception on platforms such as MyAnimeList has been broadly positive toward the English dub cast as a whole, with Acosta’s performance contributing to Sion’s impact as one of the series’ more memorable supporting figures.
