>>40211279Is this going to have smut in it?
As far as Korone, the "delinquent" girl angle is probably the easy, superficial path (likes boxing and sports in general, known for abusing her listener-san) but in a world that's split and harsh to kemo girls I feel her personality would be much better served if she were a sort of neighborhood hero of sorts, giving a hand to people in trouble with her skills and generally being helpful/useful to others.
Maybe she shows up one day while (you)'re getting mugged or bullied and just beats up the bad guys, or you find her helping an old lady carry her groceries home, despite a reputation for violence. She's skittish initially with strangers, but a complete goofball once she's comfortable around you.