“One More Knight” is less of a person and more of an idea. The idea is, vaguely, about trying to be a modern-day superhero, helping people in the smallest way and spreading peace and love. Of course that’s an imperfect notion.
But if OMK was a person he would be a guy in mid-life, looking back with regret while looking forward with frequently-dashed hope. He feels varying degrees of depression, suffers hints of obsessive-compulsive disorder, and empathizes and associates with many other forms of mental malaise.
In short, OMK is a complicated kind of a guy.