Terezi can tell that she's getting under the woman's skin. That's fine by her. Angry people tend to make mistakes, and she's not afraid of some twig of a human. She just needs an opening to get in there and rip that spear out of her hands...

"I don't need to know anything else about you. If you're not a monster, then what? Do you have another word for going after defenseless people? Would you prefer coward? Bully? Fiend?" Terezi takes inventory of the things around her while she talks, trying to find something that might make a suitable distraction. The store has already been thoroughly picked over, but there's plenty of unhelpful things that have been left behind.

"I think monster fits well enough." She picks up some kind of sports ball lying discarded nearby and throws it at Charlie with all her strength. Then she charges the woman again, making a grab for the weapon.