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When I was talking about blueprints I was referring to the nanomachines that was inside Nina. I never said it used Nina's robe as a blueprint I said NIna herself was the blueprint, hence the nanomachines which Arika lacked.
Then 2nd time when Nina grabbed Arika, the Gem itself attempted to save Arika by materializing the robe using Nina as a blueprint.
Yes it was a vague statement I admit.
Do note that blueprint also means a plan or guide.