I'm on my third play through of FFT. The plot is very conplex and confusing.

As for Delita's 'death', the game never says when that event took place. It could have been twenty years later.

I apply the same rule of thumb for video games as for movies: if you do not see a character die on screen they are usually not dead. Delita is wounded, but far from dead when the scene ends. If there were any justice it would be a mortal wound though.