I feel like maybe a short explanation of Erebemlin's behavior may be needed, especially since I have been gone lately and have not been able to bring him to this point in my posts.
Erebemlin is undergoing a lot of stress, as are the other members of the company. I've tried hinting at his ever growing irritation in earlier posts with Taitheneb. To this point, the other elf has been the only one to see anything changing, but with the return of Mellondu, he is snapping. His heart is broken with the disappearance of Amroth and unfortunately he is not dealing with it in an appropriate manner.
With that said, Erebemlin's sudden harsh speech toward Ędegard is not uncharacteristic, and I've been planning this kind of confrontation or outburst for sometime.
lmp, feel free to push his buttons if you so choose.