Sayabito: Sword of Destiny

Sayabito: Sword of Destiny (サヤビト Sword of Destiny) is a manga series by Uta Isaki. It was serialized in good! Afternoon.

Plot
This is a post-war world where human-shaped weapons called scabbards exists.

Cuifer and Livia are traveling government agents looking after the declining scabbard population, checking on their living condition, potential abuses and the worthiness of their masters.