millie:

.natalia dyer

.millie had no idea that you were her co-stars younger sister

.it shocked her so much that she nearly fainted

sadie:

.noah schnapp

.you're actually noah's triplet, along with chloe

.so, when you both played your characters, the love between you two was really there

eleven:

.will and jonathan byers

.you had to deal with losing will and finding eleven

.and then losing eleven and finding will

.your life's hard

max:

.dustin henderson

.you're always by dustin's side

.always

.steve also became an older brother to both of you as well