User blog comment:Leafstorm001/Kalista and Shadow Isles Theory/@comment-12049719-20141223023436/@comment-1188866-20141223053645

I believe that the former owner of Leona's armor, the legendary hero who could summon the sun is the same as Lightbringer, for why would you be called light bringer if you cannot bring some form of light. It might not be literally bringing light but it might work and if original owner of the armor is the lightbringer then Kalista might be the same person.