Miho Okasaki as Rimuru Tempest
Megumi Toyoguchi as Grand Sage / King of Wisdom (Rafael)
Tomoaki Maeno as Veldora
Akane Kumada as Elen
Ken Narita as Fuse
Ryuichi Kijima as Gido
Kengo Takanashi as Kabaru
Chikahiro Kobayashi as Ranga
Makoto Furukawa as Benimaru
Sayaka Senbongi as Shuna
Mao Ichimichi as Shion
Takuya Eguchi as Souei
Houchu Ohtsuka as Hakurou
Rina Hidaka as Nava Milim
Jun Fukushima as Gabiru
Takahiro Sakurai as Diablo
Yumiri Hanamori as Shizu
Rie Tanaka as Trainy
Anzu Haruno as Ramiris
Asuna Tomari as Gobuta
Haruki Ishiya as Rigur
Kanehira Yamamoto as Rigurdo
Tarou Yamaguchi as Geld
Atsushi Ono as Kaijin
Kenjirou Tsuda as Vesta
Takaya Hashi as Dwargo Gazel
Ai Kakuma as Albis
Satoshi Hino as Grucius
Manami Numakura as Sakaguchi Hinata
Shou Nogami as Tachibana Kyouya
Hiyori Kouno as Mizutani Kirara
Atsumi Tanezaki as Mjurran
Chiaki Kobayashi as Taguchi Shougo
You Taichi as Suphia
Rumi Ookubo as Souka