Cast & Characters of The O.C. >> Kirsten Nichols Cohen (Played by Kelly Rowan) Sardonic and smart, Kirsten is the one whom everyone looks up to. A loving mother and an incredibly shrewd and powerful businesswoman, Kirsten has a worldliness and intelligence, an earthliness and curiosity that sets her apart. Kirsten puts on a strong armour but she is incredibly lonely. She feels she lost Sandy as her best friend and Seth as her little boy. The joyful young family who once backpacked through Thailand and camped on the beach now sits woodenly around a formal dining table with little to say. When Ryan enters the family, Kirsten discovers she can be herself around him. Seeing herself through Ryans eyes Kirsten becomes aware of just how much she's given up and what it will take to reconnect with her son and rekindle her marriage. 2003 Virtual Rain. This is an unofficial fansite with no relation to FOX, Warner Brothers, or any of their associates. This is just a fansite opened for the purpose of exposing the show "The O.C" to new fans across the internet. Original copyright of all photos remain to FOX/WB and are used purely for the purpose of enjoying the show and furthering its fanbase.