Loki / Thor
Loki'd seen a lot, and it was a little weird he hadn't seen this race of being before either, but it wasn't unheard of, he supposed. He'd been around but Asgard itself wasn't exactly a hub for travel.
But really, it didn't matter all that much. They were invading and that was generally frowned upon so Loki and Thor would take care of it and everyone else could say they helped later. The brothers wouldn't demand credit.
If only because they would be very occupied elsewhere.
It wasn't like Loki missed the way Thor was looking at him. He smiled, sharp and a little predatory. "Let's," he agreed, twirling a dagger. "After you, dearest."