English Voice Cast
Main Cast
- Brittney Karbowski - Rimuru Tempest
Secondary Cast
- Apphia Yu - Ryota Sekiguchi
- Brandon Potter - Vesta
- Brittany Lauda - Kenya Misaki
- Bruce DuBose - Kaijin
- Charlie Campbell - Hakurou
- Chris Rager - Veldora Tempest
- Dawn M. Bennett - Shizue Izawa
- Emily Neves - Chloe Aubert
- Ian Sinclair - Souei
- Jād Saxton - Ramiris
- John Burgmeier - Clayman
- Justin Briner - Gale Gibson
- Kent Williams - Rigurd
- Kristen McGuire - Milim Nava
- Mallorie Rodak - Great Sage
- Michelle Rojas - Shion
- Ricco Fajardo - Benimaru
- Ryan Reynolds - Gobuta
- Sarah Wiedenheft - Alice Rondo
- Tia Ballard - Shuna
- Tyson Rinehart - Ranga
Minor Cast
- Austin Tindle - Gabiru
- Barry Yandell - Rugurd
- Brad Hawkins - Gido
- Bryan Massey - Dord
- Caitlin Glass - Souka
- Chris Guerrero - Ifrit
- Chris Ryan - Kajir
- Christopher R. Sabat - Abiru
- Christopher Wehkamp - Leon Cromwell
- Chuck Huber - Laplace
- Clifford Chapin - Gobzo, Yuuki Kagurazaka
- Daman Mills - Diablo
- David Matranga - Youm
- David Wald - Baron Veryard
- Derick Snow - Rigur
- E. Jason Liebrecht - Satoru Mikami
- Eric Vale - Kurobei
- Felecia Angelle - Trya
- Jamie Marchi - Treyni
- Jeff Johnson - Kaido
- Jeremy Inman - Enrio
- Jeremy Schwartz - Direwolf Boss (ep3)
- Jill Harris - Gobchi
- Jim Foronda - Geld, Orc Disaster Geld
- Jordan Dash Cruz - Tamura (ep1)
- Josh Grelle - Koenig
- Josh Martin - Myrd
- Justin Cook - Kaval
- Kenny Green - Gard Mjolmire
- Kristi Rothrock - Miho (ep1)
- Lance Hardwood - Gobte
- Lee George - Rommel
- Macy Anne Johnson - Pirino (ep7)
- Marcus D. Stimac - Carrion
- Megan Shipman - Haruna
- Meli Grant - Light (ep23)
- Mikaela Krantz - Gobtsu
- Mike McFarland - Fuze
- Mike Pollock - Orc General (ep13)
- Monica Rial - Tear
- Natalie Hoover - Eren
- Phil Parsons - Garm
- Randy E. Aguebor - Gazel Dwargo
- Shawn Gann - Dorf
- Sonny Strait - Footman
- Stephen Fu - Phobio
- Vic Mignogna - Gelmud
