Hunhow
Father of Natah and Erra; the great Sentient mind of the Old War and the voice of a family anger that outlived defeat.
The Natah directive
Tyl Regor's research woke his tomb. He called out to Lotus by the name Natah and demanded she return to her mission of destroying the Tenno. He saw his daughter's choice as a betrayal of the Sentient line and of everything lost for the sake of Tau.
The Stalker alliance
In The Second Dream he used the Stalker's hatred of the Orokin massacre, handed over the War blade and targeted the Reservoir. When the Tenno's true body was revealed, his plan came apart on the Warframe's unexpected protective act.
From enemy to temporary ally
In The New War, seeing that Ballas was using Natah and the Sentients, he aided the Drifter, offered the Nataruk and guided the Archon hunt. That partnership does not erase the old hatred; it reorders his priorities in order to shield his family from Ballas.