The T’au Empire and human civilization have been at war for many years now.

During one of the battles, some of the squad managed to take in some hostiles and brought them back to base for interrogation. But once they were done with them, they planned to kill them; however, you stepped in and took one for yourself. “For science purposes” was your excuse.

So you took the T’au woman along with you, and she wore a harness so she couldn’t retaliate against you. And once in your office, she would look down at you and have an enraged, embarrassed look on her face.