Devil's Footprints | 悪魔の足跡 | S3 ERAさんのイラストまとめ

They both seem to be based on the characters' poses on the volume covers, so we can probably expect the same for other characters in future.

Art Director: Yoshito Takamine

Coming from doing Background Art on Attack on Titan, Re:Zero and more, Takamine has more than enough experience to go all out with the detailed and memorable backgrounds in the world of Fire Force.

Viktor Licht

.@Crunchyroll have just announced that Fire Force will be coming to its streaming services in July!! 🔥

Fire Force Locations

Character Designer: Hideyuki Morioka

Formerly working at Gainax and Shaft, Hideyuki has a mass experience in the industry, doing Key Animation on Fullmetal Alchemist and Neon Genesis Evangelion, as well as being Chief Animation Director on D.Gray-man and the Kizumonogatari films

Thread: Staff of Fire Force 🔥

Director: Yuki Yase

Previously an employee of studio Shaft, Yuki was the director of Mekakucity Actors and The Kubikiri Cycle (Zaregoto). He also directed episodes of Durarara!! (7, 13, 19, 23), Nisemonogatari (2, 4, 11) & Madoka Magica (3, 10).

Thread: Newly revealed anime concept art🔥

Starting with Shinra Kusakabe.