Ronan chased the fleeing wife like a hound , as he was lightning quick in following her scent and movements.
The problem with chasing scent was that air dissipated scent from its original position very quickly. Hence it was not extremely reliable for a chase . However with the vicinity still being the Avalon palace , Ronan could rule out a few places from the list of possible escape routes as he knew for sure how well they were guarded.
Using a bit of common sense and relying on his extraordinary senses , Ronan soon started to hear laboured breathing and sound of muffled footsteps as a hooded figure came in his view.
The scent emitted by the hooded figure was definitely the same as the one in the room of the dead clan leader , hence Ronan had certainty that it was the fleeing wife although he could not see her figure clearly.