Foulwing

 is a named harpy the Soulless One must defeat in the quest The Dagger's Edge.

The Dagger's Edge
Lord Diel of Daggerfall and his sons are investigating the recent harpy attacks all along the coast. They hired a group of mercenaries called the Daggers to help them with their research, but the Daggers never returned from the Shrieking Scar.