False alarm--*
It's only natural for Guardians to be vigilant and alert, to be able to read through people and sense danger even before they happen. It's one of the requirements of their job, what with being given the task of protecting the royal family and the kingdom, miscalculations and wrong judgement could mean one's life. It's through years of intense training did Kyungsoo learn to trust his instincts, and right now it's telling him something is not right, sending the warning bells in his head to ring almost instantly.
Nothing has happened yet, and upon first look the person doesn't exactly look dangerous at all. The pretty face doesn't help either, but he's learned not to trust someone's seemingly innocent face. There's something about the woman's aura that makes Kyungsoo uneasy, and it's not only because this potential threat is a woman. He hasn't seen her around the kingdom before either, so she's probably a traveler of some sort. It doesn't stop him from tailing closely behind her though, following her wherever she goes as he keeps his distance, making sure she doesn't sense his presence in any way. She seem to be headed straight for the castle too, and that only makes him all the more suspicious.
Kyungsoo lets his instincts guide him and keeps his weapon ready.
@etxle