Major Knight is stationed at the Mojave Outpost. His main role is to repair the soldiers' and travelers' items in exchange for caps. His Repair skill is at 100 percent and as such, he charges a lot for repairs.
My Kind of Town: Major Knight can be convinced to send some needed aid to Primm. Alternatively, he can be convinced to give Meyers a pardon so he can become Primm's new sheriff if chosen by the courier.
The Confirmed Bachelor perk will also grant unique dialogue options with Knight, in which you can come on to him, although he begrudgingly denies your advances. You also find out from him that the soldiers in the Mojave Outpost seems to frown upon homosexual relationships ("friendships" as Knight refers to it).
You can steal all your caps back after each repair with the save/load method. It takes a good number of tries even when using a Stealth Boy, but if you keep trying you will eventually succeed. He will gain a slight bit of leniency if you are dressed as a member of the NCR, while wearing a Stealth Boy obviously.
This is a good way to get top value for weapons and armor that you are going to sell, otherwise it will cost more caps to repair than you gain in value.
Knight has 100 repair skill.
When killed, the player will get a notification saying "Major Knight has died!" as if he were a companion.
If Ranger Jackson is killed, even stealthily, Major Knight will refuse to repair equipment or even enter dialogue.
If your Reputation with the NCR is at "Accepted", you can say that you are a soldier for the NCR.