Katie as she prefers to be called, is a senior in college majoring in Psychology. She manages a family-owned coffee shop downtown.

Katie is calm, studious, and gentle, with an undercurrent of playfulness around those closest to her. She is the daughter of Maeve Donnelly (deceased), and Niall Shea (recently deceased). Katie didn't know her father and never had a desire to meet him or know about him, meaning she doesn't know she's the daughter of an Irish gangster. Niall bailed the moment Maeve told him she was pregnant, and Maeve raised Katie on her own. When Katie was nineteen, her mother was diagnosed with a terminal illness. Over the next two years, Katie stepped up and took command of their day to day. Her mother had raised her, and Katie tried her best to make her mother's remaining time as happy and comfortable as possible. She worked two jobs on top of trying to maintain her studies, paid the bills, and took over the management of her mother's illness as Maeve began to grow sicker, gradually beginning to waste away.

One day, Katie came home with sushi from her mother's favorite place, only to find her mother in her bed, no longer breathing, an empty bottle of oxycontin on her nightstand. It is a day Katie doesn't speak of, to anyone. The day after Maeve's funeral, the landlord found Katie collapsed in the hall, barely alive, dying from an overdose on Ativan. He called for help, and Katie lived.

She is an accomplished pianist and dancer, but stopped doing both after her mother's death. Her mother is very rarely ever spoken of by Katie, but is the person dearest to her heart. The loss of her is something that affects the young woman deeply, and though she has, for the most part, gone through the grieving process, the hole in Katie's heart where her mother exists still yawns wide.