Doesn't care about anything but the peeps, and the home they have left...like the purest purpose, without the thought. That's guardian.
Edit: I had been trying to remember back at the red war, a couple days before this had released, which of the vanguard was worried about the citizens vs the traveler...I couldn't remember between ikora and Zavala, just cool that I had gotten my answer out of no where.
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this is just my theory, but i think zavala in lightfall will start using darkness