Why do many people say that Elmin in The Attack Giant has read the script?

Many times, the role of Elmin is like a prophet. No matter what he says, something will happen, just like Lushan Chuang's guess about the unknown. Elmin talked about the sea when he was a child, which is also the theoretical basis for guiding Allen's progress. Few people in the wall know about the sea, and Elming is one of the few people who know and believe that the sea exists. At the end of the third season of animation, the sea appeared, and Elming guessed.

Then Elming guessed Arnie's real identity. The only person in the investigation team who can clearly know Arnie's identity is Allen, but Allen didn't say it out of concern for Arnie. On the contrary, after the investigation team met the female giant outside the wall, Elmin immediately understood that the female giant was Arnie and she killed two experimental giants. He guessed the whole idea, which was bold, but he guessed it right and must have read the script again.

Later, when the giant appeared in the wall, Elming immediately reacted that the three walls were not made by the giant's body, and this time he was as right as a god.

In the second season of animation, Elming once again discovered the spies Lai Na Braun and Bertolt Hoover hidden in the investigation team. This time, his guess was right.

In the third season of animation, during the Maria Wall War, the reconnaissance corps came to Sigansina, but no one saw it and no one could find the enemy. At this time, Elmin said that the enemy might be hiding in the wall, so the reconnaissance team searched the wall and found Lena.

Emin hasn't read the script yet. Who believes it?