William "Will" Byers (portrayed by #NoahSchnapp), the younger brother of Jonathan Byers and the son of Joyce Byers, is a shy, kind, and often timid boy. In the group's Dungeons and Dragons party, Will is the cleric, but later occasionally plays the role of Dungeon Master; he is referred to as "Will the Wise". In November 1983, he vanishes somewhere near "Mirkwood" after encountering the monster that escaped through a rift to the "Upside Down", an alternate dimension discovered by the Hawkins Laboratory scientists.