[Out of all his years of living, he's had various reactions to his age by mortals, but this was the most simple and mundane response. He looked down, letting out a huff of air that was dangerously close to a laugh. He shook his head hoping to push aside his amusement at her answer.]

Flattering words considering I am one of the eldest of my Sentinels. [He turned his gaze back up to her to gauge her reaction as much as he could under her strange mask.] My kind do not wither and age as others do- we are immortal, in that sense at least.