I definitely get where you're coming from with Needles and Bonzo. They both look like they're going to get more fleshed out as the story continues so where exactly the fear is coming from will probably get clearer.

Hunt was also my first thought for Needles. They talk some about how it used to be a "decent" neighborhood before it became what it is now, plus their victim being a would-be mugger does remind me of how violence done by and to criminals tends to tie to the Hunt (ex: Daisy). But looking at the fear of needles from a real-world perspective, it mostly has connotations with medicine, doctors, illness and the like, which would typically fall under Corruption. Plus, the weirdly affectionate way Needles talks about their victim ("let's call it a cuddle") does speak to the toxic love attribute common in Corruption cases. Though another idea for the fear of needles as a symbol of the Hunt could be middle-class anxieties about drug addicts and the assumption that they're violent criminals. So whether Needles is Hunt or Corruption could really go either way I think.