Daisuke Ono is a Japanese voice actor and singer who won the 4th and 9th Seiyu Awards for best lead actor for his role as Sebastian Michaelis in Black Butler, Jotaro Kujo in JoJo's Bizarre Adventure and Shukuro Tsukishima in Bleach, as well as "Best Personalities" at the 9th Seiyu Awards. Other notable roles include Erwin Smith in Attack on Titan, Shizuo Heiwajima in Durarara!!, Jyushimatsu in Osomatsu-san, Shintarō Midorima in Kuroko's Basketball, Killer T Cell in Cells at Work! and Ushiromiya Battler in Umineko When They Cry and Nobuyuki Sanada in Samurai Warriors 4 and Warriors Orochi 4. He hosts radio show Dear Girl Stories along with voice actor Hiroshi Kamiya.

Daisuke Ono plays as Jotaro Kujo (voice) in Horimiya.
Daisuke Ono is the top #1 member of the cast and appears in 117 episodes.

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 Horimiya.
Nobuhiko Okamoto is the top #2 member of the cast and appears in 85 episodes.

Koki Uchiyama (内山 昂輝, Uchiyama Kōki, August 16, 1990) is a Japanese actor, voice actor (seiyū) and singer from Saitama Prefecture. He is affiliated with Himawari Theater Group. In 2011, he won Best Rookie Actor at the 5th Seiyū Awards, and in 2015, Best Voice Actor at the Tokyo Anime Awards.

Koki Uchiyama plays as Kei Tsukishima (voice) in Horimiya.
Koki Uchiyama is the top #3 member of the cast and appears in 85 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 Horimiya.
Haruka Tomatsu is the top #4 member of the cast and appears in 48 episodes.

Mao Ichimichi is a Japanese actress, voice actress and a former gravure idol. When she does voice acting she uses her moniker M·A·O. In 2011 she made her major acting debut in the role of Luka Millfy/Gokai Yellow in the Super Sentai series Kaizoku Sentai Gokaiger.

Mao Ichimichi plays as Iris (voice) in Horimiya.
Mao Ichimichi is the top #5 member of the cast and appears in 48 episodes.

Taku Yashiro is a Japanese voice actor affiliated with VIMS.

Taku Yashiro plays as Vulcan Joseph (voice) in Horimiya.
Taku Yashiro is the top #6 member of the cast and appears in 48 episodes.

Daiki Yamashita (山下 大輝, Yamashita Daiki, born September 7, 1989) is a Japanese voice actor from Shizuoka Prefecture, Japan. He is affiliated with Arts Vision. He won the Best Male Newcomer award at the 8th Seiyu Awards in 2014.

Daiki Yamashita plays as Narancia Ghirga (voice) in Horimiya.
Daiki Yamashita is the top #7 member of the cast and appears in 39 episodes.

Shoya Chiba plays as Kiyotaka Ayanokoji (voice) in Horimiya.
Shoya Chiba is the top #8 member of the cast and appears in 25 episodes.

Ai Kayano is a Japanese voice actress and singer affiliated with Pro-Fit.talent agency; she is represented by Office Osawa since 2015. After debuting as a voice actress in 2010, she played her first lead role as Meiko "Menma" Honma in the 2011 anime television series Anohana: The Flower We Saw That Day. She is also known for her lead roles as Inori Yuzuriha in Guilty Crown, Utaha Kasumigaoka in Saekano, Mashiro Shiina in The Pet Girl of Sakurasou and Shiro in No Game No Life. She has also performed opening, ending, and insert theme for various anime she has acted in.

Ai Kayano plays as Sylphiette (voice), Fitz (voice) in Horimiya.
Ai Kayano is the top #9 member of the cast and appears in 24 episodes.

Yuka Terasaki (寺崎 裕香, Terasaki Yuka, August 4, 1983) is a Japanese voice actress, actress and singer from Kumamoto Prefecture. She is affiliated with OgiPro The Next.

Yuka Terasaki plays as Tomomi Takei (voice) in Horimiya.
Yuka Terasaki is the top #10 member of the cast and appears in 13 episodes.