NANCY MAKUHARI (YOUNGER CLONE) SPOILER!
During the attack on the I-jin fortress, the two Nancys fight and the surviving woman aboard the rocket is initially assumed to be Ikkyu's partner. She is actually Yomiko's Nancy, who has switched her weapon to the other hand to impersonate her counterpart.
The Nancy left behind survives the fortress battle but suffers severe memory loss after oxygen deprivation. At the end of the OVA she is being cared for in a secure facility and knows the dead Nancy only through the story Yomiko tells her about an "older sister."
She is not a replacement created after the climax and she is not a child for Yomiko to raise. She is the surviving half of the OVA's two-Nancy reveal, left alive without the memories that made the distinction between them matter.
NANCY 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.
Two Mata Hari I-jin · One Small Difference
The small physical tell is handedness. When the two Nancys finally fight, the survivor is able to exploit that difference by deliberately using the opposite hand and allowing Ikkyu to believe the wrong woman won.
That mistake gets her close enough to kill him and break Ikkyu's endgame from inside the rocket.
R.O.D OVA MASTER COMBAT LEDGER //
Open page →Episode 3 · I-jin Fortress · The Two Mata Hari Clones
One Nancy is left behind while the other reaches the rocket. Ikkyu assumes the woman who arrives is his partner.
He is wrong.
WHY IT MATTERS:
The fight does not end when one Nancy goes down. Its real payoff comes later, when handedness reveals that the survivor has been impersonating her counterpart long enough to get close to Ikkyu.