diana will be on the ground fighting mini-monsters and helping civilians get to safety! after the battle, once the atlanteans voice their outrage, she'll immediately volunteer to help rescue selkies (and also realize that they aren't her atlanteans, unfortunately). she'll move what rubble she can for them, and help set up temporary housing, if that is a thing they will do there. otherwise, she will ask what kinds of supplies they need, and try to persuade the guardian alliance to donate funds to get them.