Season 1 Will Byers is introduced in the first season of Stranger Things as a quiet and sensitive boy living in Hawkins, Indiana. After encountering a creature from the
Upside Down, an alternate dimension connected to Hawkins, Will disappears and is presumed dead. While trapped there, he communicates with his mother
Joyce through electrical disturbances. Will is eventually located and rescued by Joyce and
Jim Hopper. Following his return, he suffers lingering physical and psychological effects, indicating his continued connection to the Upside Down.
Season 2 After his return, Will experiences difficulty readjusting to everyday life and is subjected to harassment by other students. He suffers from recurring visions of the Upside Down and is diagnosed with
post-traumatic stress disorder by
Dr. Sam Owens. It is later revealed that Will has been possessed by the Mind Flayer, an entity seeking to expand its influence into Hawkins. Using Will as a conduit, the Mind Flayer spreads through underground tunnels beneath the town. Will is ultimately freed from the entity's control with the help of his family and friends.
Season 3 In the third season, Will becomes increasingly isolated as his friends begin focusing on romantic relationships. He discovers that he still retains a psychic sensitivity to the Upside Down, allowing him to detect the Mind Flayer's presence. This ability helps the group identify the entity's continued survival through its possession of
Billy Hargrove. Following the defeat of the Mind Flayer during the events at Starcourt Mall, Will moves away from Hawkins with his mother,
brother, and
Eleven.
Season 4 Now living in Lenora Hills, California, Will struggles with emotional repression and a sense of displacement. During
Mike Wheeler’s visit for spring break, Will supports Eleven as she faces bullying and later accompanies Mike, Jonathan, and Argyle in an effort to locate her after she is taken to a facility in Nevada. During the journey, Will reveals his romantic feelings for Mike through a painting, though he does not state them directly. Upon returning to Hawkins, Will senses the Upside Down's renewed presence as it begins merging with the real world.
Season 5 In the fifth season, Will remains in Hawkins as the town is placed under military quarantine following the breach between dimensions. His psychic connection to the Upside Down intensifies, allowing him to perceive events from the perspective of its creatures and track
Vecna’s movements. Will plays a central role in locating and protecting children targeted by Vecna and later demonstrates the ability to disrupt the hive mind through his connection to it. Over the course of the season, Will comes out as gay to his family and friends, who express their support. During the final confrontation, Will uses his psychic link to help weaken Vecna, contributing to his defeat and the destruction of the Upside Down. == Reception ==