There are multiple characters with this similar name. You may be looking for Nicolas De La Cruz.

Nicolae is an ancient Carpathian sent out to hunt vampires in other parts of the world. He had actually connected with Destiny when she was a child and a prisoner to a vampire. Nicolae refused to completely leave Destiny's mind, needing to be with her while the vampire used her in unspeakable ways so he could protect her, and see what it was like to be small and helpless. Nicolae imparted his knowledge to Destiny so that she was able to free herself. However, when he finally got her to say something to him, he realized she was his lifemate, and was proud of her for the courage it took to go against her nature and kill her tormentor.