The Executioner and Her Way of Life, Vol. 6 (manga)

Series:

After a deadly battle with Pandæmonium, Menou and the others narrowly emerge victorious. Despite Pandæmonium's last words leaving them uneasy, they head toward their next destination--the Sword of Salt, in order to kill Akari. However, the armed criminal organization, Iron Chain, stands in their way. Together with a friend from Menou's past, they must reach the oasis in the Balar desert to formula