Unlike the regular comic books Romance comics often had things unseen in the rest of the media such as pages of pen pal listings or, as in the case with Julia Roberts, someone whom the readers could write and ask romantic advice of.
While Julia was shown at the top the page, the rest was feature was text.
So while not exactly a character, she was still fiction. Julia ( whoever she or he might have been from the editorial staff at DC) took the tone of a serious but caring aunt (or judging by the way they drew her, older sister) you wish you had.