Ruptus Pentephraxis was the High Leaguesmaster during the Quint Trilogy. He was the father of Ulbus Pentephraxis and the grandfather of Cowlquape Pentephraxis.

Ruptus Pentephraxis worked together with Imbix Hoth to attempt to finally defeat the sky pirates in a massive battle, the Battle of the Bringer of Doom, but he was killed when the flight-rock in the sky ship The Bringer of Doom malfunctioned. Most unusually for a Leaguesmaster, Ruptus Pentephraxis often went without his high tricorn mitre.