Diamond Girl

Claire Barnard is a diligent paralegal whose quiet efficiency keeps the law firm running. She quietly holds affections for Denny while managing the merger details. When Regan enlists her help, Claire begins to see how appearances can shape power and money. Her arc moves from professional loyalty toward a choice about love and personal integrity.

Regan Montana is the haughty older brother who wants to maximize the winery value. He recruits Claire to help with the merger and uses a romance cover to pressure Denny. He enjoys the control of the negotiation but remains torn by a growing attraction to Claire. In the end he contemplates leaving for London but is drawn back to Napa Hills by love.

Denny Montana is a carefree lawyer who enjoys tennis and social life more than strict law. He is initially unaware of the full stakes of the merger but grows jealous as Claire becomes entangled with Regan. He orchestrates a plan for Claire to pretend to be in love with him to provoke Regan. In the end his push helps set the stage for a life with Claire at Napa Hills.

Abby Montana is Regan's mother who hopes her son will stay and manage the vineyard. She embodies the family legacy that ties the wine estate to the past. She expresses concern about selling the property and longs for the heritage to endure. Her wishes influence the emotional stakes of the plot.

Margo De La Vera is an attractive real estate broker who represents the buyer side. She becomes a catalyst for negotiations and is impressed by Claire during the makeover. Her presence highlights the commercial pressure behind the winery deal. She is a pragmatic player in the merger plot.

Jean-Marc Bernier is a potential buyer from outside the valley who may bottle wine under a Napa Hills label. He is wary of motives and is drawn to Claire while Regan tries to manipulate his interest. He represents external pressure in the deal and the market dynamics. He acts as the catalyst for the conflict over the property value.