I'm a sucker for a good toast.
- Zoe Baker, The Wedding
Zoe Baker is the cousin of Beth Pearson. She is a photographer. We first meet her in the Season 2 finale, The Wedding, when she does the photography for Kate and Toby's wedding. Zoe's mother left her with Beth's mother when she didn't want to take care of her anymore. This caused Zoe to be a very bitter teenager.
In the beginning of Season 3, it is revealed that Kevin and Zoe had begun a "casual" relationship following Kate and Toby's wedding. It is also revealed that Zoe will be helping Kevin find out more about Jack's time Vietnam.