[Oh...! Her head whips around as she hears him approach, but there's nothing of her usual skittish body language present. She looks simply surprised for a second before she smiles at him. She doesn't recognise the uniform, but that is a soldier's uniform. Of course he'd want to help out; that's what soldiers do.
She's also used to people recognising her as the crown princess. It doesn't give her pause (even if it maybe should, given that this is a different world).]
Yes, I'm fine! But thank you anyway; it's nice that you wanted to help. [He gets a little curtsy - not an overly deep one; just as a thank you. Even if it's part of his job to assist, it's good manners.] I'm just faster than any old trap.