Harold Perrineau plays Boyd Stevens, FROM's de facto protagonist and the township's self-appointed sheriff. A retired U.S. Army veteran, Boyd arrived in Fromville with his son Ellis and wife Abby. Abby was killed by creatures in Season 1 — a loss that has fuelled his entire arc. Boyd discovered the talismans that repel creatures in enclosed spaces, organised the township's survival protocols, and has survived situations that should have killed him multiple times. By Season 4, he is physically deteriorating from parasitic worm damage and Parkinson's — and psychologically collapsing. In S4E7 he presented a reincarnation theory to the township and jackhammered a basement wall open after Khatri's ghost said 'maybe.' The door behind the wall was real. Boyd's belief has become the town's primary navigation tool.
Two major reads: (A) Boyd is the town's chosen protagonist — the person whose belief and commitment unlock each new revelation. Every major forward movement in Fromville has required Boyd to commit, and the town answers. (B) Boyd is being prepared as MIY's next vessel. His trajectory in S4 — physical destruction, psychological collapse, the 'become what you fear' framing — mirrors how MIY might convert a host. Both reads are coherent with the same evidence.