Marie's point of view, sometime in between Identity and Supremacy. Word: Trigger.
Over time, Marie noticed that Jason had certain trigger words: "gun," "pursuit," "assignment." His entire body would tense, adopting that easy tautness that manifested itself whenever he felt threatened or excited. His head would snap up, blue eyes clear and intent with purpose—then he would realize it was only her. Relaxing, he would send her an apologetic glance and return to whatever he had been doing previously.
Marie tried to avoid using such words as much as possible.