Mass Effect Edit
Kate hides in the main facility with Aaron when batarian terrorists invaded the asteroid and activated the fusion torches that pushed it toward the colony. She furtively transmits distress calls which are picked up by the SSV Normandy. When the Mako lands, she calls Commander Shepard and provides intelligence throughout the assignment. Once two of the three fusion torches are deactivated her hiding place is found; Kate's brother is murdered by Balak, the leader of the terrorist group, when she refuses to tell him about Shepard.
Along with a few other hostages, Kate is imprisoned in an office containing an explosive. When Shepard confronts Balak, the batarian says he will detonate the explosive, killing the hostages, if the Commander does not let him go.
If Shepard chooses to save the hostages, Kate survives. She thanks the Commander for everything, but grieves the loss of her brother. She wants Shepard to remember her brother if the Commander crosses paths with Balak again.
Kate has a positive impression on some of the people she works with. Colleague Simon Atwell, who dubs her "Katie", describes her as a brilliant but headstrong person, and it is that stubbornness that got her brother killed. She attributes the trait as something that runs in the family, as her father was with the Alliance back on Earth.
Mass Effect 2 Edit
If Balak wasn't allowed to escape at the expense of his hostages, the news reports that Reverend Michael Bowman, her father, holds a ceremony for the lost workers on the asteroid.
If Kate survived, she sends the Commander the following message instead, titled "Glad you're okay."