So Eridan was assimilated. Well, that answers that question, at least. He doesn't push, not because he doesn't want to know more about what happened with Eridan, but more because he doesn't really feel comfortable even trying himself.

"Reading up on horoscopes because Fef mentioned it," he repeats. "So Fef's still around?" And associating with Eridan, despite the shouting match he'd witnessed when she'd initially come aboard.