Nobuhiko Okamoto is a Japanese voice actor and singer from Tokyo, Japan, affiliated with Raccoon Dog. Previously, he was affiliated with the Pro-Fit agency. He won the Best New Actor Award on Third Seiyu Awards and Best Supporting Actor Award on Fifth Seiyu Awards.

Nobuhiko Okamoto plays as Yuu Nishinoya (voice) in Is it Wrong to Try to Pick Up Girls in a Dungeon?.
Nobuhiko Okamoto is the top #1 member of the cast and appears in 85 episodes.

Taneda Risa is a voice actress (seiyuu) born July 12, 1988 in Tokyo, Japan. She is currently affiliated with Office Osawa. 

Risa Taneda plays as Himeragi, Yukina in Is it Wrong to Try to Pick Up Girls in a Dungeon?.
Risa Taneda is the top #2 member of the cast and appears in 52 episodes.

Haruka Tomatsu (戸松 遥, Tomatsu Haruka, February 4, 1990) is a Japanese actress, voice actress and singer, affiliated with Music Ray'n. She is a member of the J-pop idol unit Sphere.

Haruka Tomatsu plays as Candelira in Is it Wrong to Try to Pick Up Girls in a Dungeon?.
Haruka Tomatsu is the top #3 member of the cast and appears in 48 episodes.

Inori Minase is a Japanese actress, voice actress and singer who made her singing debut in December 2015 under King Records label. In March 2016, she won the Best Lead Actress Award in the 10th Seiyu Awards for her leading roles as Jun Naruse in the box office hit The Anthem of the Heart and as Yuki Takeya in the anime television series School-Live!. Her other major roles include Chino in Is the Order a Rabbit?, Noel in Celestial Method, Hestia in Is It Wrong to Try to Pick Up Girls in a Dungeon?, Rem in Re:Zero − Starting Life in Another World, Chito in Girls' Last Tour, and Tamaki “Kimari” Mari in A Place Further than the Universe.

Inori Minase plays as Mabushiina (voice) in Is it Wrong to Try to Pick Up Girls in a Dungeon?.
Inori Minase is the top #4 member of the cast and appears in 45 episodes.

Yoko Hikasa is a Japanese voice actress and singer, currently affiliated with I'm Enterprise. She aspired to become a voice actress after watching Sailor Moon, and later attended Nihon Narration Engi Kenkyuujo, a seiyuu training school. Her major breakthrough was the leading role as Mio Akiyama in the hit series K-ON.

Yoko Hikasa plays as Arshes Nei (voice) in Is it Wrong to Try to Pick Up Girls in a Dungeon?.
Yoko Hikasa is the top #5 member of the cast and appears in 39 episodes.

Yuka Keicho plays as Mia Grand in Is it Wrong to Try to Pick Up Girls in a Dungeon?.
Yuka Keicho is the top #6 member of the cast and appears in 37 episodes.

Saori Hayami is a Japanese voice actress, singer and narrator. She is represented by the agency I'm Enterprise.] As a singer, she is signed to Warner Bros. Home Entertainment Japan. In 2016, she won the 10th Seiyu Awards for Best Supporting Actress. Her major voice roles include Yukino Yukinoshita in My Teen Romantic Comedy SNAFU, Ayase Aragaki in Oreimo, Shirayuki in Snow White with the Red Hair, Miyuki Shiba in The Irregular at Magic High School, Shinoa Hiiragi in Seraph of the End, Kotohae Hanami in Witchy PreCure!, Urara Shiraishi in Yamada-kun and the Seven Witches, Yotsugi Ononoki in Monogatari, Aila Jyrkiäinen in Gundam Build Fighters, Wako Agemaki in Star Driver, Shōko Nishimiya in A Silent Voice, and Yumeko Jabami in Kakegurui – Compulsive Gambler.

Saori Hayami plays as Haruka Ogasawara (voice) in Is it Wrong to Try to Pick Up Girls in a Dungeon?.
Saori Hayami is the top #7 member of the cast and appears in 26 episodes.

Yurika Kubo (久保 ユリカ, Kubo Yurika, May 19, 1989) is a Japanese voice actress, singer, talent and model from Nara prefecture. She is affiliated with Stay Luck and her record label is Pony Canyon. She is also a member of μ's (pronounced "Muse"), which is part of the Love Live! franchise. She is nicknamed Shikaco. Her old stage names were Yurika Narahara (楢原 ゆりか) and Yurika Kubo (久保 由利香).

Yurika Kubo plays as Kikyo Kushida (voice) in Is it Wrong to Try to Pick Up Girls in a Dungeon?.
Yurika Kubo is the top #8 member of the cast and appears in 25 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 Is it Wrong to Try to Pick Up Girls in a Dungeon?.
Yoshitsugu Matsuoka is the top #9 member of the cast and appears in 16 episodes.

Shizuka Ishigami plays as Hikawa (voice) in Is it Wrong to Try to Pick Up Girls in a Dungeon?.
Shizuka Ishigami is the top #10 member of the cast and appears in 13 episodes.