Ballas
Architect of the Warframe project, the Orokin Executor who turned love for Margulis into ownership and founded Narmer.
Margulis and betrayal
For all his talk of love, he did not shield her from Orokin judgement. After her death he turned his rage on the empire and passed secrets to the Sentients. Forcing Margulis's appearance onto Natah shows that his love was a possession that never recognised the other's will.
Warframe bodies
He turned the Helminth transformation into a weapons programme, making failed bodies usable through Tenno Transference. Trapping Excalibur Umbra in the memory of his son's death is the clearest example of design power bent into personal punishment.
Narmer and his end
He made the Sentient invasion an instrument of his own rule, used the Veils to manipulate what people longed for, and steered Praghasa towards the Sun. He fell when he tried once again to claim Lotus as Margulis. His end came from being unable to accept that love is not compulsory adoration.