3923 (young adult)
Keiran is somewhat of a goofy person, emotionally. He prefers to crack jokes and display himself in a playful, but often helpful, manner. While life is full of serious moments, and need for focus (especially at work, where his humor is quieted in favor of safety and diligance) he doesn't feel he needs to contribute to that all the time.
He very much looks after the people he works with, second in respect only to their forman at the mines. He cares about making sure things are done right, and that everyone can go home with smiles on their faces.