Answer: The champion who says “The first time I returned from the void, it was to save me. Now it’s to save them” is Kai’Sa, Daughter of the Void. Of course it is. You might have been thinking Kog’Maw ...
Dragon Age: Inquisition's character creation notably took place in a gassy green void ... and a gassy purple void—in case you didn't listen to a damn thing I just said about Inquisition.