Funny bit here: kamo is duck, but it's also gangster slang for an easy mark (someone easy to cheat). So 'Kamo-chan' is very on the nose naming - her name is basically 'Gullible-chan' or 'Easy-chan', which explains why she's a target for all the scumbags.
And Kamo is not a name anyone gives their kids, so this is 100% deliberate by the author.