A happy smile and a polite demeanor, those were generally the first things any one noticed about Eagle. He seemed pretty relaxed even despite all of the clamor going on around him and only raised his soft voice when the noise became to loud to be heard over.
Based just on those things he didn’t appear much like a warrior at all, but Loki was no doubt a bit more observant than most people. Most obviously Eagle had admitted to being a Commander and a Commander must have some skill with battle or they never would have attained that rank, unless the position had some how been bought. He did wear a sword, as many people in this world did, but it didn’t seem entirely ungainly on him as it did some of the others. Swords were a less often used weapon on his world but he still had some knowledge of them. It really wasn’t too dissimilar from a laser sword anyway.
His regal outfit suggested he held some kind of rank on this world but he didn’t bother treating the servants as if they were lower class than himself. In fact he went so far as to apologize to one of the stable hands who clearly had bumped into him before he continued the little introductory conversation he and Loki were having.

“No, I don’t suppose we will. It is only too bad there wasn’t more information about this. Anything could be waiting for us out there.”

And was that a touch of excitement in his voice?

“Anyway, I should wish you good luck. It really was very nice to meet you.”