This character first appeared in memos as
Wesley, Roddenberry’s middle name. But Bob Justman
pushed for sex change for the character, on the grounds
that teenage boys appeared too often in similar roles.
It was time for a girl, Justman argued, in this case,
Leslie. The Leslie/Wesley decision wavered back and
forth so often that even when the casting call for the
series went out, on December 10th, the character was
described as “an appealing 15-year-old Caucasian girl.