Crown of Midnight- Mort
Idk if this has already been established but in CoM when Celaena first meets Mort their conversation goes:
“What is your name?”
“Celaena Sardothien,” she ground out. The skull barked a laugh.
“Oh that is too funny! The funniest thing I’ve heard in centuries!”
Mort knows everything and Mort, being the sinnnamon roll that he is, laughs in her face because he knows damn well who she really is even if she won’t admit it.