Sithaph

Sithaph is a Dragonkin that was shown in the final cutscene after completing the quest While Guthix Sleeps. It appears that he is planning something along with two fellow Dragonkin: Sakirth and Strisath. He is also wearing a red robe. He appears to be leading the other Dragonkin.

According to what was seen in the cutscene, it seems as if Sithaph has gained great power from the Stone of Jas. Sithaph's body was glowing brightly just like the Player's during the quest after you have made contact with the stone. Since the Dragonkin were forced to protect the Stone of Jas, It might be a clue that after the stone was stolen, the curse that was laid upon the Dragonkin had been released and they no longer are bound to protect it anymore which hints at their freedom.