Nico & Hotaru
It was strange for Hotaru to be referred to as "sister" too. Her memories of Nico from that time were good though and so it wasn't a bad thing either. She'd never been anyone's sister before and that was probably one of the parts of the entire thing that she enjoyed. Everything else was not so wonderful in her mind.
"How are you doing?" Hotaru asked tentatively. She wasn't sure how much of a relationship Nico would want to have with her now given the fact that the sister thing had been a made up scenario by the Dome.