Elsa had been grading some papers in her cave of an office when she was suddenly alerted to a presence by the sound of a somewhat familiar voice. She hadn't been expecting to hear it in the vicinity of her left ear though and she jumps, dropping her pen and putting a hand over her heart.
I'm going to go with doesn't know but is maybe familiar with because Elsa works at Redbright?
"Oh! Uh... Hi."