Loki was hoping Puck was home. If not, he'd just go find wherever the fae was, but home would be easiest. He was curious both if Puck had heard the latest news, and he wanted to show the other something. Yes, it was a bit of preening on Loki's part, but why not? He did genuinely want the other's opinion, even if his outfit was practical too.

So he found himself outside Puck's home, wearing armor, and knocking strongly on the door.