Penny had been waiting for Charlie's arrangement.
She would rather not leave with the other evacuees to some unfamiliar place, as she would rather stay with Charlie to prove her worth.
After all, she was well aware that she had no way of removing Fleur's poison from her body and had to pin her hopes on Charlie.
However, if she became worthless to Charlie, he wouldn't have a reason to save her.
A year would pass in the blink of an eye, and she would definitely die without the antidote.
As such, her heart sank to rock bottom when Charlie told her to leave with the other evacuees, as she was really terrified Charlie might abandon her altogether after this.
Her cultivation was sealed, she had no freedom, and Fleur's poison was a ticking time bomb in her body.
If Charlie decided to abandon her in some corner of the world, that would be the end of her existence.
Still, Charlie could see the conflict and gloom on her face, and he said, "Ms. Singer, no other evacuee knows where they