Amalgam Hound (2022)

Blurb:
Amalgams: fearsome tactical weapons deployed to the front lines of battle. As the leader of a special investigation unit tasked with hunting down rogue Amalgams, Theo Starling has no love for these tools of war. In a strange twist of fate, he’s assigned a partner named Eleven, who looks like a young girl—but she’s actually an astonishingly lifelike Amalgam. And though Eleven is incapable of understanding human emotions, Theo must cast aside his reservations as they work together to uncover a terrorist plot threatening the nation …!

Source: www.anisearch.com/manga/73946