Tomokazu Seki (born September 8, 1972) is a popular and very famous seiyuu in Japan. He formerly worked for Haikyou, now he is the head of Atomic Monkey.

Tomokazu Seki plays as Gaisorg (voice), Item Sounds (voice), Bibidebi (voice), Prince Bulldont (voice) in Record of Ragnarok.
Tomokazu Seki is the top #1 member of the cast and appears in 147 episodes.

Hikaru Midorikawa (緑川 光, Midorikawa Hikaru, born May 2, 1968) is a Japanese voice actor from Otawara, Tochigi who is represented by Aoni Production.[1] He is best known for the roles of Softon in Bobobo-bo Bo-bobo, Tamahome in Fushigi Yûgi, Seiran Shi in Saiunkoku Monogatari, Gridman in Gridman the Hyper Agent, Heero Yuy in Mobile Suit Gundam Wing, Kaede Rukawa in Slam Dunk, Ayato Sakamaki in Diabolik Lovers, Rantaro Amami in Danganronpa V3: Killing Harmony, Zelgadis Greywords in Slayers, Ryuho in s-CRY-ed, Ein/Hayate from the Dead or Alive series, Marth from the Fire Emblem series, Akihiko Sanada from Persona 3, Lancer from Fate/Zero, Kyōsuke Natsume from Little Busters!, Sakamoto from Haven't You Heard? I'm Sakamoto, Zora Ideale from Black Clover, Kouga from Saint Seiya Omega, Ensign Nogami from The Cockpit, Garou from One-Punch Man, Cherry Blossom from SK8 the Infinity, and Lilia Vanrouge from Disney: Twisted-Wonderland.

Hikaru Midorikawa plays as Silva (voice) in Record of Ragnarok.
Hikaru Midorikawa is the top #2 member of the cast and appears in 52 episodes.

Show Hayami, born as Yasushi Ohama, is a Japanese voice actor and singer. He is married to voice actress Rei Igarashi, and is the adoptive father and step-uncle of fellow voice actor Hideyuki Hayami.

Show Hayami plays as Narration in Record of Ragnarok.
Show Hayami is the top #3 member of the cast and appears in 42 episodes.

Junichi Suwabe is a Japanese voice actor and singer.

Junichi Suwabe plays as Leone Abbacchio (voice) in Record of Ragnarok.
Junichi Suwabe is the top #4 member of the cast and appears in 39 episodes.

Wataru Takagi (高木 渉) is a Japanese voice and stage actor.

Wataru Takagi plays as Okuyasu Nijimura (voice) in Record of Ragnarok.
Wataru Takagi is the top #5 member of the cast and appears in 39 episodes.

Yukihiro Nozuyama (野津山 幸宏, Nozuyama Yukihiro, born December 24, 1996) is a Japanese voice actor from Osaka Prefecture. He is affiliated with Rush Style.

Yukihiro Nozuyama plays as Ryohei Hayashi (voice) in Record of Ragnarok.
Yukihiro Nozuyama is the top #6 member of the cast and appears in 24 episodes.

Takahiro Sakurai is a Japanese voice actor who was born in Okazaki. He was a member of 81 Produce and has been attached to INTENTION since July 20 of 2014, the management company established by Kenichi Suzumura, one of his good friends.

Takahiro Sakurai plays as Sae Itoshi (voice) in Record of Ragnarok.
Takahiro Sakurai is the top #7 member of the cast and appears in 16 episodes.

Yoshitsugu Matsuoka is a Japanese voice actor from Hokkaido. He is affiliated with I'm Enterprise. He was honored at the 6th Seiyu Awards for Best New Actor in 2012 and the 10th Seiyu Awards for Best Lead Actor in 2016. He is best known for being the voice of Kirito from Sword Art Online, Sorata Kanda from The Pet Girl of Sakurasou, Sora from No Game No Life, Arata Kasuga/Astral Trinity from Trinity Seven, Sōma Yukihira from Food Wars!: Shokugeki no Soma, and Masamune Izumi from Eromanga Sensei. As of June 17, 2019, he is the current official Guinness World Record holder for the most unique sound bites provided by a voice actor at an exceeded 10,000 words in Danmachi - Memoria Freese.

Yoshitsugu Matsuoka plays as Jingo Raichi (voice) in Record of Ragnarok.
Yoshitsugu Matsuoka is the top #8 member of the cast and appears in 16 episodes.

Miyuki Sawashiro is a Japanese voice actress and narrator affiliated with Aoni Production. She has voiced in a number of Japanese anime dubs including as Petit Charat/Puchiko in Di Gi Charat, Mint in Galaxy Angel, Beelzebub in Beelzebub, Celty Sturluson in Durarara!!, Kurapika in Hunter x Hunter, Sinon in Sword Art Online, Ayane Yano in Kimi ni Todoke, Fujiko Mine in later installments of Lupin the Third, Queen in Mysterious Joker, Jun Sasada in Natsume's Book of Friends, Shinku in Rozen Maiden, Haruka Nanami in Uta no Prince-sama, Kotoha Isone in Yozakura Quartet, Kanbaru Suruga in Bakemonogatari, Jun Kanzato in Persona: Trinity Soul, and Lag Seeing in Tegami Bachi. Source: Wikipedia

Miyuki Sawashiro plays as Deffrot (voice) in Record of Ragnarok.
Miyuki Sawashiro is the top #9 member of the cast and appears in 13 episodes.

Soma Saito (斉藤 壮馬, Saitō Sōma) is a Japanese voice actor affiliated with 81Produce.

Soma Saito plays as Wein Salema Arbalest (voice) in Record of Ragnarok.
Soma Saito is the top #10 member of the cast and appears in 12 episodes.