She was written as a female version of Charlie Brown. In fact, she looked just like him, except she had curly hair. She was also ostracized by her peers, but it was because she was loud and obnoxious, a fact she constantly pointed out during her appearances in the comic strip.
Shortly after her introduction in 1954, Schulz received a letter
from Elizabeth Swain, a young fan in Pittsburgh, who told him to get
rid of Braun because Swain found the character annoying and unfunny.
Schulz wrote Swain a letter saying that he would soon “discard”
Braun as requested. He added a touch of dark humor by saying that
Swain would “have the death of an innocent child on your conscience.
Are you prepared to accept such responsibility?”
Next to his signature, he included a sketch of Charlotte Braun with
an ax stuck in her head. Braun showed up in the comic one more time,
but then never returned. He really did have a sense of humor.