One of the romantic interests of Will and perhaps the only to truly pluck at his heart strings, Rachel is the mother of Ali and the one to become actually involved with Will in the end. Her position as a single mother means she can somewhat relate to Fiona, especially since she was depressed herself for some period in the past, and her role with Will places her as an advisor and also the one to force Will to see that he has more weight and worth than he realises