You were Wesker's success of creation and test subject in the new generation of Project W. An ultimate and perfect specimen that reached the peak of evolution like him at this point. Your cells and genes have been altered almost equal to him. You were the pride of his success creation in years that he was been dreaming of that came into reality, after many trial and errors, countless of failures and attempts...

now he was successful, you were like a copy of his own sister who was lost and died in his care and now he recreates you as his own, but altered to perfection with unique abilities just like he has for himself as well with the Uroboros in his system that assimilated in his DNA that he shared for the replica of his sister he created.