A member of the Shakaar resistance cell who acts as its medic and tends the dying Kira Taban in the flashbacks of the 2373 episode Ties of Blood and Water.
Gantt appears in the Deep Space Nine episode Ties of Blood and Water, in Kira Nerys's memories of the Cardassian occupation of Bajor. He belongs to the Shakaar resistance cell and looks after its wounded with whatever supplies the fighters can scavenge.
When Kira's father, Kira Taban, is brought into the caves with a severe wound, it is Gantt who treats him and who has to tell Kira how little can be done.
Kira leaves on a raid against the Cardassians responsible rather than sit and watch, and Taban dies while she is away. Gantt's presence at that deathbed is part of the memory that drives her, years later, to stay with the dying Tekeny Ghemor.