The upcoming Chained Soldier (Mato Seihei no Slave) anime series has announced three new characters that will be joining its voice cast. The production team has also released character design visuals for the characters. The anime is scheduled to premiere sometime in 2023. 

The new voice cast includes Yume Miyamoto as Himari Azuma, Mari Hino as Shushu Suruga, and Hina Tachibana as Nei Ookawamura. They join Yuuya Hirose as protagonist Yuuki Wakura and Akari Kitou as Kyouka Uzen.

The production staff for the anime adaptation consists of Gorou Kuji (Bungo to Alchemist assistant director) as the series director, Junji Nishimura (Vlad Love) as chief director, Hiroyuki Yoshii (Just Because!) as character designer, and Kaoru Nishimura (Dances with the Dragons) as color designer. Seven Arcs is in charge of the animation production for the series. 

The original Chained Soldier manga series written by Takahiro and illustrated by Youhei Takamura was first serialized on the Shonen Jump+ app on January 5, 2019 under Shueisha’s Jump Comics label. 10 tankoubon volumes have been released in total as of May 2022, with the forthcoming 11th volume slated for release on September 2, 2022.

Yen Press releases the manga in English. It describes synopsis as:

Decades ago, gates to an otherworldly and dangerous dimension known as Mato—the “Demon City”—appeared across Japan. Those who partook in the “peaches” growing there gained unique abilities—but only if they’re girls. When down-in-the-dumps high school boy Yuuki Wakura finds himself caught up in a gate, he’s saved by Kyouka Uzen, the beautiful commander of the 7th squad of the Demon Defense Force, who…orders him to become her slave?!

Source: Chained Soldier Official Twitter