The Lonely Mechanic Boy
He was never the same after the war.
There had been a short period of hope left in him, directly after it, but it was quickly destroyed, all aspects of hope leaving him as if they were never even there. The jokes left as well. The jokes, the humor, the hiding the pain, it all just vanished. He couldn't hide his true self anymore.
When he started building his new life again, he pushed away all past memories. He attempted to be a completely different person. Someone that focused completely on their work, drowning themselves in hours upon hours of labor. He drank coffee and energy drinks as if his life depended on it. It wasn't humane, but it distracted him.
It wasn't exactly living, but it was good. It worked for him. He wasn't exactly happy, but then again, what did happiness ever do for him? Hurt him. He wasn't exactly okay, but he was calm.
He could have learned to be alright, not happy, but alright one day, had he never met the Avengers.
I own my part of the plot, and OC's. Marvel and Rick Riordan own the rest.