Arthur Boyle, the delusional yet powerful “Knight King” of Fire Force, is voiced by Yūsuke Kobayashi in the Japanese version and Eric Vale in the English dub. Kobayashi brings a perfect mix of deadpan humor and heroic flair to Arthur’s eccentric personality.
Japanese Voice Actor: Yūsuke Kobayashi

Date of Birth
April 25, 1985
About Yūsuke
Yūsuke Kobayashi is a Japanese voice actor affiliated with Yu-rin Pro. He is widely known for his ability to portray both comedic and emotionally intense characters, often balancing humor with dramatic depth.
In Fire Force, Kobayashi’s performance as Arthur Boyle stands out for its dry delivery and comedic timing, especially in scenes where Arthur fully embraces his knightly delusions. At the same time, he effectively conveys Arthur’s strength and sincerity during battle moments.
Kobayashi gained major recognition for voicing Subaru Natsuki in Re:ZERO − Starting Life in Another World, a role that showcased his emotional range and earned him industry acclaim.
Hometown
Tokyo, Japan
Career Highlights
- Arthur Boyle – Fire Force (2019–2020)
- Subaru Natsuki – Re:ZERO − Starting Life in Another World
- Senku Ishigami – Dr. Stone
- Arslan – The Heroic Legend of Arslan
- Soma Yukihira (supporting/related casting context) – Food Wars! (industry overlap context)
His role as Subaru is particularly celebrated for its emotional intensity and character development across multiple seasons.
Full Current Filmography
Note: The following reflects documented, widely cited credits and may not be exhaustive.
Anime Television Series (Selected, Chronological)
- 2015 – The Heroic Legend of Arslan (Arslan)
- 2016 – Re:ZERO − Starting Life in Another World (Subaru Natsuki)
- 2019 – Fire Force (Arthur Boyle)
- 2019 – Dr. Stone (Senku Ishigami)
- 2021 – Re:ZERO Season 2 (Subaru Natsuki)
Anime Films
- 2017 – Re:ZERO OVAs (Subaru Natsuki)
- 2019 – Re:ZERO: Memory Snow (Subaru Natsuki)
Video Games (Selected)
- Re:ZERO game adaptations (Subaru Natsuki)
- Dr. Stone game projects (Senku Ishigami)
Critical Reception
Yūsuke Kobayashi is highly regarded for his expressive acting and ability to convey emotional extremes.
- Anime News Network frequently highlights his performance as Subaru as one of the most emotionally demanding roles in modern anime (https://www.animenewsnetwork.com/)
- His portrayal of Arthur Boyle is praised for its comedic precision and commitment to the character’s absurd yet endearing personality.
Social Media
X: @yusuke032510 (https://x.com/yusuke032510)
English Voice Actor: Eric Vale

Date of Birth
April 3, 1977
About Eric
Eric Vale is an American voice actor, ADR director, and scriptwriter with a long-standing career in anime dubbing. He is closely associated with Funimation/Crunchyroll and is known for voicing a wide range of characters, from comedic roles to more serious and dramatic figures.
As Arthur Boyle in Fire Force, Vale delivers a performance that leans into Arthur’s eccentric “knight” persona while maintaining the character’s underlying sincerity. His comedic timing and confident delivery help bring Arthur’s delusions to life in a way that resonates with English-speaking audiences.
Beyond acting, Vale has contributed significantly behind the scenes as a director and writer, shaping numerous English anime adaptations.
Hometown
Dallas, Texas, USA
Career Highlights
- Arthur Boyle – Fire Force
- Trunks (Future Trunks) – Dragon Ball franchise
- Sanji – One Piece (Funimation/Crunchyroll dub)
- Yuki Sohma – Fruits Basket
- Tomura Shigaraki (early/related casting contexts) – My Hero Academia (industry association context)
Vale is especially iconic for voicing Future Trunks and Sanji, two of the most recognizable characters in anime dubbing.
Full Current Filmography
Note: The following reflects documented credits from publicly available sources and may not be exhaustive.
Anime (English Dub Roles, Selected, Chronological)
- 1999 – Dragon Ball Z (Future Trunks)
- 2004 – One Piece (Sanji – Funimation/Crunchyroll dub)
- 2007 – Claymore (Sid – supporting role)
- 2008 – Soul Eater (Spirit Albarn)
- 2019 – Fruits Basket (Yuki Sohma – reboot)
- 2019–2020 – Fire Force (Arthur Boyle)
Video Games (Selected)
- Dragon Ball game series (Future Trunks)
- One Piece game adaptations (Sanji)
ADR Direction & Writing (Selected)
- Dragon Ball Z Kai (ADR work)
- One Piece (ADR script adaptation contributions)
- Fruits Basket (ADR direction contributions)
Critical Reception
Eric Vale is widely respected in the anime dubbing industry for both his performances and his behind-the-scenes contributions.
- Behind The Voice Actors profile (https://www.behindthevoiceactors.com/Eric-Vale/) highlights his extensive career and fan-favorite roles.
- His portrayal of Sanji and Future Trunks is frequently cited as iconic within English anime dubs, with fans praising his consistency and character interpretation across decades.
Social Media
X: @ericvale (https://x.com/ericvale)
