Who is Ray Johnston from One of Those Hideous Books Where the Mother Dies and what is their importance?

Ray Johnston is Ruby's unfaithful boyfriend in Boston. Ray tells Ruby he will come to see her at Thanksgiving, but doesn't do much to keep up their relationship. Ray rarely calls Ruby and only emails her erratically. Ray is somewhat of a player, first dating Lizzie and then dumping her for Amber. Each time, Ray uses the same pick up lines.