What Would Happen If Someone Who Looked Like a Sentinelese Person Went to North Sentinel Island?

Imagine a person who closely resembled a member of the Sentinelese, wore little to no clothing, and could visually blend in with the island’s inhabitants.

If they somehow arrived on the island, how would the Sentinelese likely react? Would appearance make any difference or would they still recognize the person as an outsider?