Will Byers has never been depicted as possessing superpowers in a traditional sense. However, he maintains a deep connection to the Upside Down, a parallel dimension central to his story.
Throughout his experiences, Will demonstrates remarkable mental endurance, surviving traumatic events linked to the Upside Down. Given this connection, a fitting ability for him might be dimensional awareness—an intuitive sense of other realities beyond the ordinary world.
"Will has a strong connection to the Upside Down and has shown great mental resilience. A suitable power for him could be dimensional awareness."
Will's character embodies strength through endurance rather than overt superhuman abilities, suggesting his power lies in perception rather than force.