Bab 113: Feeling free.

Aragon had his eyes fixed on Theon who was about to reach into the portal, his leg making the move to to walk in when the wind suddenly picked up, changing direction. The familiar wrecking feeling of imminent danger and excitement skyrocketed, and Aragon could feel all of his hair standing up just by the presence of that particular person who had shown up out of nowhere. 

Aragon should have picked up his presence if he's been here all this while, meaning he must have learnt to properly hide his aura even from Aragon himself who could sense even the tiniest of things. And you could see the clear shock written all over Aragon's face as he stared at the man, making him slightly pause in reaching Theon in time.