What does this exchange indicate bout emily's character? what foreshadowing do u sense in her refusal to comply with the law?

“I want some poison,” she said to the druggist. She was over thirty then, still a slight woman, though thinner than usual, with cold, haughty black eyes in a face the flesh of which was strained across the temples and about the eye-sockets as you imagine a lighthouse-keeper’s face ought to look. “I want some poison,” she said.

“Yes, Miss Emily. What kind? For rats and such? I'd recom—”

“I want the best you have. I don't care what kind.”

The druggist named several. “They'll kill anything up to an elephant. But what you want is—”

“Arsenic,” Miss Emily said. “Is that a good one?”

“Is . . . arsenic? Yes, ma’am. But what you want—”

“I want arsenic.”

The druggist looked down at her. She looked back at him, erect, her face like a strained flag. “Why, of course,” the druggist said. “If that’s what you want. But the law requires you to tell what you are going to use it for.”

Miss Emily just stared at him, her head tilted back in order to look him eye for eye, until he looked away and went and got the arsenic and wrapped it up. The Negro delivery boy brought her the package; the druggist didn't come back. When she opened the package at home there was written on the box, under the skull and bones: “For rats.”