Loose threads

[Iscah]

You could say that Hydaelyn needed a voice because she was weak and needed a way to communicate with us, but if that's the case did Hydaelyn kill Minfilia on purpose?

It's not so much "killed on purpose" as that the devout servant of the god gets to skip death entirely and is called directly to her god's side.

In most contexts that would be more of a joyous rapture sort of thing, but evidently rather less so when your particular god is low on battery.