The official website for the TV anime adaptation of Kei Urana’s Gachiakuta manga has announced the addition of three new voice cast members. The newly revealed actors will portray the characters Tamsy, Delmon, and Cthoni, further expanding the ensemble for the ongoing series.
Mitsuki Saiga, known for roles such as Hibiki Shikyouin in Pripara, will join the cast as Tamsy. Tamsy is described as a “Giver” who wields a distaff called Tokushin, characterized by a calm demeanor and sharp observational skills.
Masami Iwasaki, whose credits include Yokumiru Mera in My Hero Academia, will voice Delmon. Delmon is a passionate and loyal Giver with a large build and a loud voice, utilizing a hose with a spray nozzle as his vital instrument.
Rounding out the trio is Ayahi Takagaki, recognized for her work as Lisbeth in Sword Art Online, who will take on the role of Cthoni. Cthoni is an elusive Giver capable of manipulating a manhole-type vital instrument that can absorb objects and transfer them to other locations.
These characters are slated to make their full appearance in the upcoming Episode 7 of the anime.
Gachiakuta’s Expanding Universe and Production
The Gachiakuta anime, which premiered in Japan on July 6, 2025, is currently streaming on Crunchyroll. The series is produced by Studio Bones, with Fumihiko Suganuma directing. Hiroshi Seko is responsible for the series scripts, while Satoshi Ishino handles character designs and serves as chief animation director. The anime’s music is composed by Taku Iwasaki.
Previous cast announcements for the series include Aoi Ichikawa as Rudo, Katsuyuki Konishi as Enjin, Yoshitsugu Matsuoka as Zanka, Yumiri Hanamori as Riyo, Toshiyuki Morikawa as Regto, Yuuki Shin as Jabber, Miku Ito as Chiwa, and Ryusei Nakao as Alice (Old Lady). Additional cast members announced earlier include Mie Sonozaki as Semiu, Satoshi Hino as Gris, Kazuki Ura as Follo, and Hisako Tōjō as Tomme.
Based on Kei Urana’s manga serialized in Kodansha’s Weekly Shōnen Magazine, Gachiakuta plunges viewers into a dystopian world where humanity’s discarded waste, along with those deemed criminals, are cast into a massive abyss. The story follows Rudo, a boy framed for murder and thrown into this “Pit,” where he must confront monstrous trash beasts and join a group known as the Cleaners to uncover the truth and seek vengeance. The manga, which began serialization in February 2022, has been praised for its action, world-building, and intriguing protagonist.
