Philippe is a wealthy Frenchman. He is the husband of Dominique and father of the ballet students Sophie and Laurent.
Philippe fancied Shannon's friend Nora and tried to hire her as his au pair, but was turned down. Shannon later accepted the job after her stepmother cut off her funds from her deceased father and she turned down money from Boone. ("Abandoned")
Shannon mentioned to Sayid that she had dated "the father of Laurent". ("Whatever the Case May Be")
Philippe appears in a deleted scene at Shannon's family home in the second season DVD.