Lonely Doomsday

Author, I have a few questions for you. First question, you mentioned in your work that companies can trade across time and space. A company that can complete transactions across time and space will never let a mercenary complete the task. It is obvious that the company has the financial resources and ability to cultivate more capable armed forces of its own to complete the mission. And even if there are mercenaries, they can only complete small things within the scope of the company's management, and things that the company doesn't want to take care of. Those things that the company doesn't want to take care of can only be things that have little to do with the company's interests, and are too dangerous. If the company sends people to solve them, it will cause losses, and then be annexed by other forces, so it doesn't want to take care of them. But if you say that the protagonist is awesome, then there's nothing I can do about it. Second question, you said that the protagonist has traveled through time, but in a world where companies that can master cross-time and space transactions exist, a rookie who has only traveled through time and space for two years may be used for experiments, or more than one person has traveled through time. Before that, many people have traveled through time, and time travel has become the norm in this world, so cross-time and space transactions are likely to be related to time travel. At that time, a phenomenon may appear. Protagonist: I am extremely powerful. Company: We travel through time. Protagonist: Travel a Thousand Miles a Day. Company: We travel through time. Protagonist: I want to destroy the world. The company travels through time and goes back to beat up the protagonist and nip the danger in the cradle. The third question, the author, you didn't even lay out the background. One moment it's an old drunkard, the other moment it's a little girl. If you really want to give these two characters roles, then write it well. For example, when the protagonist is observing the surroundings, he thinks of a certain character, and then write about the day when the protagonist and that character first met, and why the protagonist will think of that character when he sees that scene. The fourth question is, if you want to write about why the protagonist accepts this dangerous mission, then write it carefully. But it turns out that you are just short of money and want to treat the little girl. The little girl tells you to give up. What the hell does that matter? If you really want to write it, you can write that the protagonist talks to the doctor, and then goes to the ward to see the little girl. Then the treatment is about to stop because of lack of money, and then a man in black or something gives the protagonist the opportunity to participate in a dangerous mission. At first, the protagonist is hesitant. After that, the protagonist goes to the ward to see the little girl, and then the protagonist makes up his mind and wants to do that dangerous mission. Then switch the perspective back to the present, where the protagonist is performing a mission. If you write it this way, although it is cliche, I am sure there will not be too many logical loopholes