She did not lower her guard when she heard the noise downstairs. She may have turned in the direction of the noise, but her body language said 'I eat backstabbers for breakfast.'. Rena had trained for years to measure up to the standards of her father, her grandfather, and Rattigan Von Krauser, the Earth Draconian warrior. So yes, she was prepared for what she assumed would be a shaowy assassin trying to get the better of her, if it came at all.
It didn't, though. Two men came upstairs and pointed at her, asking - nay, demanding - if she had seen someone that she thought she'd seen earlier in the day. So, is that how it is, then? Well, for the moment, Rena's expression remained unchanged, save for the slight narrowing of eyes. She answered them, truthfully even.
"I haven't seen anybody up here, except you two. You spoiled my nap."
The last part was slightly untrue, but that was only because...while she spoke it to the bounty hunters...she was actually directing it to the fellow that must've pounded on her door and hid.
"My suggestion to you two, from one working sword to another. If he's here, he has a room. If he's not in it, he's run off into the night or has business elsewhere. It isn't worth raising hell at an inn at night. You can't exactly miss a scarred man with a scarf and an overcoat, now can you?"