Elspeth is. (I wanted to give her the same power and have her look the same, so I wanted her genetically the same. And it’s feasible, given that in Luminosity, Bella had a number of eggs harvested, so they could have snagged the one that would have ripened when Renesmee was conceived in canon; and Edward is a vampire, so I can handwave as necessary on his end.)
Also in fairness, someone born earlier of the same parents would not be genetically identical.
Elspeth is. (I wanted to give her the same power and have her look the same, so I wanted her genetically the same. And it’s feasible, given that in Luminosity, Bella had a number of eggs harvested, so they could have snagged the one that would have ripened when Renesmee was conceived in canon; and Edward is a vampire, so I can handwave as necessary on his end.)
Particularly if the genetics of the parents have clearly been altered dramatically too. :)