'Oh yeah, that's right. Flunra should know about the Lunirich, I still haven't thought of an answer for the Countess...', Rex thought remembering that he still has a question that he has yet to answer.
But knowing that the Countess is a complex entity, he doesn't need to rush it.
Just like she said time doesn't bind her the way Rex and the others were bounded, so even if it takes a couple of years for Rex to get the answer to her question it shouldn't be that long for her. Because of that Rex is not in a hurry for an answer.
Rex also remembered that during the fight before, Flunra did something to the Countess.
What he did infuriates the Countess so it makes sense that the black dimension that they need to get through doesn't quite fit Flunra, the Countess definitely doesn't like him at all.
Cough! Cough!
Flunra coughs a couple of times feeling his entire body getting squashed by the pressure.