The confirmed core
Capcom identifies Miyamoto Musashi as the protagonist. The official announcement places him in an early Edo-period Kyoto setting, where he obtains the Oni Gauntlet and faces the Genma threat.
The current PlayStation preview also describes the game as dark fantasy action and connects its setting, swordplay, and Oni-powered identity.
Can a newcomer start here?
The latest PlayStation material says the game is designed so first-time players can enter without direct story connections to earlier Onimusha titles. That is a newcomer-accessibility statement, not a claim that series history is irrelevant or that every reference has been disclosed.
What is deliberately not listed
This is not a complete cast database. The approved sources do not justify publishing an exhaustive character roster, relationship map, faction chart, or a full enemy encyclopedia. We also do not turn old-series expectations or fan speculation into confirmed facts.
If a name is not supported by the current cited material, it does not belong in this pre-release briefing.
Use later official updates for additional characters and lore. Until then, this page stays anchored to Musashi, Kyoto, the Oni Gauntlet, and Genma.