X6 has an affinity for black cats. In the Commonwealth, coursers are also considered an omen of bad luck, and he likes how clean and useful the animals are, how they devote themselves to killing vermin. He’s never had a pet, but sometimes, when no one’s looking, he gets a brush and cleans the cats at the Starlight Drive-In.
Coursers are fiercely proud of their status as enforcers and protectors of the Institute, proud to have been chosen. Their coats, the symbol of their status, are very important to them. X6 hates being asked to wear anything else, though he doesn’t say so.
X6 enjoys startling the other companions by sneaking up on them and unexpectedly appearing in rooms when they turn their back, but he would never admit to it.
X6 has heard about MacCready’s exploits as a mercenary and respects him; he once tried to make a “friendship overture” by following MacCready, leading to the most terrifying two hours of MacCready’s life.
X6 doesn’t know how to do basic medical care, as he rarely gets hurt. When he does get hurt, he’s expected to wait for someone at the Institute to fix it for him. (The Institute doesn’t want coursers learning how to maintain their own bodies.) For this reason, he thought stimpacks were like jet and psycho and is confused and dismayed when he sees Curie using them on injured people.
He’s used to sleeping in the Institute and is very sensitive to noise; he often steals MacCready’s sniper nests to sleep in. He once scared the shit out of MacCready by unexpectedly appearing at his post thirty feet off the ground and got shot. MacCready was sure he was going to die. X6 thought it was kind of cute.
He enjoys his job, but if he had to pick a favorite part, it would be seeing the look of terror on people’s faces when they realize that they’re utterly outclassed.
He’s secretly very opinionated, but years of seeing other coursers get wiped or decommissioned for “seditious talk” have made him really wary of sharing his thoughts.
It’s difficult to earn his loyalty, but once you’ve got it, he’s with you for life.