Chainsaw Man vol 1, Tatsuki Fujimoto

The first volume of a story of a half man-half demon with chainsaws for arms and a face. The protagonist's father gambled the family's existence away, and upon death, the son became a demon hunter in hock to the Yakuza to pay off the debt. The story opens as he merges with his demon dog and becomes the eponymous Chainsaw Man, joining a group hunting demons in downtown Tokyo. At points puerile, and brutal, the main character is instantaneously endearing, the world around him constructed in an oddly believable manner given the subject matter, which makes this unlike much else before it, and an engaging read.

Fujimoto-san ranked second place in 2022 at the Manga Taishō awards for "Look Back" which shares the artistic and storytelling quality of Chainsaw Man, without the knee deep mess of a chainsaw demon wading through zombie gore. Definitely worth using that as an entry-point to look at the depth of characters he builds, with obvious empathy and skill to render them as whole beings, then come back to Chainsaw Man vol 1 for that, plus the gore, and giant bat demons.