What if Senna IS Thresh
Idea inspired by the Zed = Nocturne theory where the shadows take over Zed's mortal form and Nocturne emerges. Anyway, here goes
Lucian and Senna.
Their weapons had 'L' and 'S' inscribed on them.
Light and Shadow.
Lucian, Light. Senna, Shadow. What if Lucian drew his power from light, and Senna drew hers from darkness? Senna, always walking a fine line between controlling the darkness and being consumed by it, finally lost control and Thresh emerged in an ethereal Jekyll and Hyde scenario, and locked Senna away in the Lanters so she could never regain control. Lucian, unable to admit that his beloved could fall to darkness, instead convinced himself that Thresh had captured her rather than become her. He then had to re-work his wife's old weapon to use the light so he wouldn't succumb to the same fate. This would explain why the two weapons look different, if they were originally intended to use different energies.
