Nepeta jumps a bit, but quickly smiles and waves as she cautiously wanders in.

"Hey Eridan. Um..."

How are you feeling? is a silly question at this point. Bad, obviously, his tone says that much, and she doesn't expect Eridan to pour his heart out to her like Equius would. Saying sorry would be even worse; sorry for what? she can picture him saying, and should she respond with I'm sorry I couldn't purrtect you or I'm sorry you got caught and had your thinkpan assaulted would probably wound his pride, leading to an ugly discussion and making them both feel worse. Can't start the road to healing with that, now can she?

Peeking over his shoulder, Nepeta settles for asking, "What're you reading? Anything epic?"