Natarle was always prideful.
Her pride had made her choose this path. Her parents, who she was so proud of, who were so proud of her, were soldiers. She wanted to be a solider, too. And now here she was, dying at the hands of a so-called ally.
Her pride still wouldn't leave her. She wouldn't let Azrael win. She'd die at the hands of her former friends before she let him kill her, and she'd bring him down with her.
So when the Archangel fired on the Dominion for the last time, Natarle's last thought was a victorious one.