Mike officially gives her the nickname "El," shortened from the "011" tattoo on her arm.

She places a figurine of the Demogorgon next to Will's piece to indicate he is being hunted by a monster. Secondary Storylines Full article: The Gothic Pasts of Stranger Things

She flips the board over to represent a parallel dimension—later known as the Upside Down—and places the "Will the Wise" token on the black underside to show he is hiding.

A key moment in the episode involves Eleven using a board to explain what happened to Will.

When Lucas threatens to tell Mike’s mother about her, El uses her telekinesis to slam the bedroom door shut, revealing her abilities and suffering a nosebleed from the effort. The D&D Translation