Gaten Matarazzo originally auditioned for the role of Mike, along with Noah Schnapp, but he was ultimately offered the role of Dustin.[2]

The Duffer Brothers conceived Dustin Henderson as the "heart" and intellectual, yet vulnerable, anchor of the Stranger Things ensemble, designed to break 1980s tropes by elevating the "nerdy sidekick" to a crucial, brilliant leader. He was originally designed as a blend of classic 80s movie characters, specifically combining the "chubby kid" archetype (like Chunk from The Goonies) with the smart-mouthed, witty, and essential, yet often overlooked, teammate (like Mouth)

He is in my opinion the best charecter becuase he is funny nicebut also cares for people and is emocinaly vornrable but thats why poeple love him.