Marvo Power is an agent with British Intelligence.
The time frame of Power's activities in the early days of the Second World War. The locale for his operations is Great Britain.
To the majority of the world who might know anything about him, Power is a reporter for a major newspaper called the Daily Globe. Under that cover identity, Power has the ability to go to wherever his real espionage line of work would take him. While getting caught snooping can be trouble for anyone, claiming one is doing it on behalf of his editor and being believed is a lot better than being napped as a spy.
Power is a good looking, athletic man with wavy blond hair complete with a long swatch dangling from his forehead. We learn that he speaks and reads German like a native and is quite knowledgeable about ship operations as well as being able to fly an airplane. He is intrepid as shown by his willingness to fly into Germany to locate Nazi invasion plans and good (or lucky) enough to actually pull it off.
Power apparently has some very impressive abilities with disguises as shown in the second adventure when he decides it is important to alter his appearance to impersonate a just-murdered speaker at a political convention. He not only does it well enough to fool the spectators, he convinces the killer of the actual man to take another go at him.
Working with Power is Jane Hawkins (shown as Joan in the first adventure), a blonde haired fellow reporter. She is every bit as adventurous and daring as Power, shown by the fact that when he suggests an outrageous plan, she is gung-ho to go along with it. It is doubtful that Hawkins knows anything about Power's real job but it is clear that she and he are both good friends and very close competitors in the news business.
- Upon hearing a man speak, Power decides immediately, "That fellow must be an enemy agitator. He has a foreign accent!"