Board Thread:Character Discussion/@comment-25077005-20150514022748

When The Snow Queen aired we know Ingrid is the firstborn with ice powers then Elsa the second firstborn has ice powers. Most likely the firstborns of Arendelle after Ingrid will have ice powers. So in this case Anna & Kristoff's firstborn would have ice powers like Elsa, and Ingrid.

What do you think of this theory of the firstborns born with ice powers? 