¿Who is he?

Eleven is going to a summer camp to learn how to socialize before going to highschool in Hawkins.
At the camp she will meet new people and new friends while she discovers more of herself.
Eleven is almost always the secondary in the stories, but it is her turn to be the protagonist and Mike wonders, who is he?
These characters were created by the Duffer brothers and the story is inspired by stranger things.

The original language of this story is Spanish, I will translate the chapters little by little