William Joyce

 is a character in Quantum Break.

Summary
William Joyce is a renowned physicist. His only relative is Jack Joyce; his parents died while we was very young. He suffers from schizophrenia, but displays heightened intelligence and an uncanny inability to draw connections between seemingly unrelated data. When he was 19, he initially proposed the existence of the chronon field, and built the first prototype to take advantage of it, leading to the events of Quantum Break.