Hiro Shimono is a Japanese voice actor and singer affiliated with I'm Enterprise. His notable roles include Keima Katsuragi in The World God Only Knows, Connie Springer in Attack on Titan, Nai in Karneval, Ayato Kamina in RahXephon, Akihisa Yoshii in Baka and Test: Summon the Beasts, Norifumi Kawakami in Ace of Diamond, Kokichi Ōma in Danganronpa V3: Killing Harmony, and Dabi in My Hero Academia.

Hiro Shimono plays as Deroline (voice) in Demon Slayer: Kimetsu no Yaiba.
Hiro Shimono is the top #1 member of the cast and appears in 94 episodes.

Akari Kito plays as Suzune Horikita (voice) in Demon Slayer: Kimetsu no Yaiba.
Akari Kito is the top #2 member of the cast and appears in 25 episodes.

Natsuki Hanae is a Japanese voice actor from Kanagawa Prefecture. He is affiliated with Across Entertainment. In 2015, he won an award at the 9th Seiyuu Awards as one of the best male newcomers. He also hosts the radio show ŌHana (逢坂市立花江学園 Ōsaka Shiritsu Hanae Gakuen) along with voice actor Ryōta Ōsaka. "Hanae" is actually a pseudonym; his real surname has not been disclosed by his agency.

Natsuki Hanae plays as 9S (voice) in Demon Slayer: Kimetsu no Yaiba.
Natsuki Hanae is the top #3 member of the cast and appears in 24 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 Demon Slayer: Kimetsu no Yaiba.
Yoshitsugu Matsuoka is the top #4 member of the cast and appears in 16 episodes.