|Occupation:||operations and engineer|
|First appearance:||"In the Still of the Night"|
On a mission aboard the Cantabrian's support ship USS Determination in early 2376, HEIDI malfunctioned when the Vendoth hacked the Determination's computer core. As a result, she attacked the engineering crew, killing Lisa Oh before Milami Thall took her forcibly off-line.
Upon the Determination's return to the Cantabrian, HEIDI was reactivated. Shocked at being forced to murder Lisa Oh under Vendoth control, she required counseling. (Star Trek: The Cantabrian Expeditions: "Howl")