Eleven, also known as “El,” is a central character in the popular Netflix series, “Stranger Things.” She is portrayed by actress Millie Bobby Brown and is known for her psychic abilities and unique style.

In Season 2 of “Stranger Things,” which premiered on October 27, 2017, Eleven is believed to be around 13 years old. This is based on the timeline of the show, which is set in 1984, one year after the events of the first season. In the first season, Eleven was said to be 12 years old, having been born in 1971.
The second season of “Stranger Things” picks up where the first season left off, with Eleven having disappeared after defeating the Demogorgon. It is revealed that she has been living in hiding with Sheriff Jim Hopper, who has been taking care of her.
Throughout the season, Eleven struggles to come to terms with her past and her abilities, and she sets out to find her mother, who she believes is still alive. Along the way, she meets a group of other individuals with psychic abilities, including Kali, also known as Eight.
As the season progresses, Eleven’s abilities become more powerful, and she is able to use them to defeat the Mind Flayer, a powerful and malevolent entity that has taken over the town of Hawkins. In the season finale, Eleven is seen attending the Snow Ball dance with her friends, signaling a new sense of acceptance and belonging.
It is worth noting that the exact age of Eleven is not always explicitly stated in the show, and there is some ambiguity around her age. Additionally, as a character with supernatural abilities and a traumatic past, her experiences and development do not necessarily align with a typical age timeline.
Overall, while Eleven’s exact age in Season 2 of “Stranger Things” is not always clear, it can be inferred based on the timeline of the show and her age in the first season. However, her age is not necessarily the most important aspect of her character, as her abilities, experiences, and relationships with other characters drive much of the plot and emotional resonance of the show.