The T-X appears as a pretty young woman with Scandinavian features, whose blonde hair is braided into a tight bun. Dressed in a rust-colored jacket, skintight pants, and highheel boots, T-X has a model-like figure. So far it's the only female outershealth terminator appeared in the films. Skynet considers T-X's beauty is germane to the parameters of the mission.

The T-X appears to possess a limited emotional range (as many advanced Terminators do), which it exhibits even when it is alone.