How a character who's constantly in danger and make them a TDTL damsel in distress

The hero in the 3rd arc is basically being hunted down because he's half-phantom half-human _{Think Youmu Kopaku} and his blood and general oddness attracts people who at best want to use him for his blood and at worst straight-up want to murder him for being an "abomination"

Oh and he's exs with the people who trying use his blood so he has some trouble on whether to trust them or not, making him a bit gullible and he ends in danger in 4 out of 5 of the chapters in his arc

So how to make him have all the stuff happen to him and not have him be a complete and utter drag _{Especially considering that he's somewhat of a bad boy}

Being a damsel isn't about what happens to a character, it's about how a character responds to what's happening. A damsel sits down, gives up, and needs someone to rescue them. A character who isn't a damsel can still be rescued, but they'll actually be doing some things themselves to improve their situation too. It will help to make the people hunting him ambiguous to the audience as well. If the audience doesn't know whether or not to trust them, then it will be believable that the main character is confused as well.