Kieli, Vol. 7 (light novel‪)‬

When the Corporal's wires get crossed and his memory begins to fail,
Harvey and Kieli are forced to temporarily set aside their search for
Beatrix to scout for pre-War parts for their afflicted comrade. Along
the way, they encounter a strange beast who knows far too much about
Undyings and has taken an unsettling interest in Harvey. But it may be a
far more mundane menace from Kieli's past that threatens the couple's
continuing journey...