Christine is a relatively minor character in the play, though nonetheless important in illuminating certain character traits of the main players. As a humble servant with no ambitions to rise above her lowly status, Christine is ideally placed to provide a stable, disinterested perspective on the stormy, tumultuous relationship that unfolds between Julie and Jean.
Like most of the contemporary audience, Christine is repulsed by what she sees as Julie's indecent behavior, which is entirely unbecoming of a young lady of quality. In that sense, she acts as a way in to the drama for those of us not part of the rarefied aristocratic world that Julie inhabits. Although not above moral lapses herself, she is the voice of tradition, of God-fearing Christianity, whose old-fashioned values provide a commentary on the convention-defying actions of Julie and Jean. In that sense, one could say that Christine's role is similar to that of the chorus in an ancient Greek tragedy.