Whiplash

Whiplash is a young female dragon and the first Primehorn to be introduced in the series. While she wasn't outright mentioned, it is predicted that Whiplash was first seen in the epilogue of Book 1: From the Darkness, but was officially introduced in Book 2.

In Book 4, once she is strong enough to carry a human, Whiplash becomes the dragon mount of Devin.