Haggai Godin is an agent with the British Secret Service.
The background for Godin is very sketchy at best. The most that is known is that Godin is the son of a Russian émigré who moved to Istanbul before Haggai was born as Godin stated in one adventure that he was raised in Istanbul from childhood. That is about all that is revealed of the history except that Godin's vast knowledge of Europe and the Middle East shows a life spent traveling extensively.
Before his associate, Charles Mason, met Godin, he was warned by Godin's employer that Godin was a strange man but if he suggested a line of action, Mason should seriously consider it as it would likely be the right one. That sums up quite well the nature of Haggai Godin, a man not prone to giving an opinion unless it was well thought-out and experience enough to make those thoughts worth considering.
Godin loves the good life. He is described as a huge man with gigantic hands, large green eyes, a deep boisterous laugh, and a zest for adventure. He drives extremely fast, eats large amounts of very spicy, exotic foods, and always has readily to hand a flask of expensive brandy. His skin is compared to that of rhino skin and his face is said to have large folds of skin hanging from his jowls. He is, as several characters noted, a most extraordinary sight.
The Colonel Charles Mason, mentioned above, is a member of the CIA, working as a liaison between his agency and the British Secret Service. He accompanies Godin on every published mission and is every bit as important to the assignments as is Godin, though there is no doubt that it is Godin who is really leading the action.