A warforged that escaped the war, met another defector, and together tried to start a new life. Unfortunately, the kingdom sent assassins after them in order to silence them and make sure that they would not switch sides. The human died, but the warforged lived on, carrying with it the remorse of not being able to save them. To honor its friend, it kept the nickname that the human gave it - Hector, which was a pun based on its model name (Tactical Heavy Operations Robot, model H -> H, T.H.O.R. -> Hector).

Survivor's guilt was the main idea behind the build: It was a Fighter Rune Knight built to tank damage and protect its allies as better as it could (Heavy armor master, Interception fighting style, Cloud rune).

Tanking damage is not optimal in DnD (killing the damage dealer is always the best choice) but it was meant to be a low-level one shot, so it was fine. Unfortunately work, family and other real life issues got in the way and the party wasn't able to convene on a date where everyone could gather and play for four hours straight.