* Might contain spoilers
Thanks for the compliments! (as well as enjoying the twist :3), I'm the one who designed the characters/targets.
Actually, the "human" you're trying to shoot is the manananggal! It is a Filipino urban legend with its torso detached from the waist. Honestly, I'm not surprised there was some confusion behind it, it's my fault for not making the floating half look clearer so I understand. It was also a general pointer that every target with a green outline is supposed to be human, and every target with a red outline is supposed to be monster (Though I also forgot to add those outlines to a lot of the monsters.)
Here is the manananggal in a closer look! I designed her to look similar to Sadako (a Japanese fictional character) who has her hair covering her face. 
I hope this clears things up