According to lore, Firiona Vie was established and got owned by frogloks loyal to Venril Sathir and giants, and they left. Came back, failed again.
Firiona (the chick herself) was kidnapped/missing and a third attempt was made. This time, they were successful, mentioning that the giants they faced before were no where to be seen due to internal strife among the giant factions. In fact, they had managed to set up trade with some giants in the Dreadlands.
This is likely one of those "friendly" giants. He sits outside the fort along its wall, drops nothing. I guess they didn't have time to fulfill matching game to the lore, so they left them as just killable mobs.