As a referee, what should I do if I think the other reviewer of a paper is not objective?
My perspective as an Elsevier editor: This happens sometimes and is easy to see through. An outright "accept" on a first submission is so rare as to raise eyebrows in any case (at least, in my field). The editor has probably noticed the lack of thorough review by this referee and will give the review the appropriate weight (i.e. none). That said, I would not see any harm in emailing the editor if you are concerned, so long as you keep it polite and to the point.