Ahead of a simulcast release on Crunchyroll, the official anime website and accounts for Teogonia unveiled a brand-new visual and April 11 at 24:30 JST (effectively April 12 at 0:30) broadcast debut for Japanese television. Additional cast and staff members were also confirmed.
Teogonia Main Visual

The newly announced cast is as follows, joining leads Mutsumi Tamura and Kana Hanazawa:
Orha voiced by Yoshitsugu Matsuoka
Vegin voiced by Atsushi Miyauchi
Manso voiced by Katsuya Fukunishi
Elsa voiced by Manaka Iwami
Alue voiced by Hana Tsuigai
Polek voiced by Hiroshi Naka

Orha

Vegin

Manso

Elsa

Alue \

Polek
Based on the light novels by Tsukasa Tanimai and Koichiro Kawano, Kunihiro Mori directs Teogonia at studio Asahi Production, with series composition by Tomoyasu Okubo, character designs by Koichiro Kawano (Muhyo & Roji’s Bureau of Supernatural Investigation) and music by Kenji Fujisawa (BAKI).
Additional staff members include:
Art Director: Kiyotaka Yachi
Art Designer: Emi Toya
Color Designer: Eri Oga
Director of Photography: Ryo Kujirai
Editor: Ami Ishii
Sound Director: Yuji Tange
Music Producer: Takahiro Yamanaka
Crunchyroll describes the story:
Humans fight to protect their land from invading demi-human tribes in relentless battles. As his world is engulfed by intense warfare, Kai, a village boy from Lag, joins the fight to defend all he knows. After Kai’s comrades fall one by one and he’s injured, he suddenly recalls memories from another life. A fantasy tale unfolds as a village boy explores a world of magic, mystery, and heroism.
Source: Press Release