The royal guard is regretting every one of his decisions that brought him to this point.
Why didn't he stay at home and raise cows, or steal cows, or slaughter cows, or otherwise engage in some sort of cow-based career. No, he was too good for cows. He had to see the world. He wanted to make something of himself. And now he is on a dirty, disgusting island full of villains, where someone spat on his face and someone else picked his pocket and he doesn't even want to think about what's on his boot, in order to track down the child of a random minion.
"Are you, uh, Alida daughter of Gustav?" he asks a girl who looks like the picture.