STEPHEN WILCOX SPOILER!
His role is mechanical rather than ideological. The fortress, its elaborate systems and much of the impossible technology surrounding the I-jin reflect the same idea behind the rest of the group: take the achievement associated with a historical figure and turn it into pulp-science excess.
Wilcox appears during Drake's battle through the fortress alongside the returning Jean-Henri Fabre. His limited screen time is exactly why he is easy to miss in a character database, but he belongs to the OVA's I-jin roster.
STEPHEN THROUGH THE ARCHIVE //
I-JIN CONSPIRACY & SYMPHONY //
Open page →Historical Figures Recreated as Superhuman Operatives
Gennai Hiraga arrives with spectacular electrical weaponry. Jean-Henri Fabre commands insects. Otto Lilienthal takes to the sky. Genjo Sanzo is transformed through the imagery surrounding his legendary journey. Stephen Wilcox becomes part of the machinery supporting the I-jin fortress. Ludwig van Beethoven is revived because his music is the final weapon Ikkyu needs.
Nancy makes the idea more complicated. She is also an I-jin, derived from Mata Hari, but spends most of the story inside the British Library operation.
WHAT THE OVA DOES NOT EXPLAIN:
R.O.D gives enough information to understand that these people have been recreated and altered, but it does not provide a complete technical system for how every I-jin is made. The abilities are built around the historical figure, not around a detailed rulebook.
R.O.D OVA MASTER COMBAT LEDGER //
Open page →Episode 3 · I-jin Fortress · The Ordinary Man Gets His Fight
Stephen Wilcox is a different kind of opponent. He is physically integrated into the fortress machinery, making the engine room and its mechanisms part of the fight rather than confronting Drake as another conventional superhuman combatant.
Drake has none of the abilities surrounding him. He survives with firearms, experience and the willingness to keep fighting until the machinery around Fabre and Wilcox comes apart. The engine-room destruction kills both I-jin and helps bring the fortress down.
WHY IT MATTERS:
Drake spends the OVA surrounded by people who phase through walls, control paper, ride clouds and return historical figures from the dead. Episode 3 finally gives him the corresponding payoff. He does not acquire a supernatural answer to any of it. He remains a soldier, and that is enough.