Manga
Cover of Gakkou Youkai Kikou: You
Official art from the manga
Official art from the manga
Artwork from volume 4 of the manga
Light novel artwork.
Gakkō Yōkai Kikō: Dai-hachi Kaidan Boshūchū, illustrated by nishieda
Gakkō Yōkai Kikō: Dai-hachi Kaidan Boshūchū, illustrated by nishieda
Misc
07th expansion party 6 promotional image showing many different characters.