It's already been a few days since Nova was wounded, and he pretty much recovered.
Right now Nova was with his parents and Karla, he made some excuse that Fiona left already, he didn't want others to know about her, yet.
Because he wasn't sure what the Space-Time Shrine thought about Fiona.
"Are you two really leaving? Why don't you stay a few days longer?" Arin asked with a sad voice, she didn't want to depart from her son so early.
Once she and Martin were to reach the real Shrine in the Outer World, it would be much harder to see each other.
It may even take a few years until they're going to meet again.
Nova resolutely nodded at his mother, "I'm going, I'm really worried about Earth, and the few friends I had there..."
When Nova put the problem like that, both his parents were silent. They knew better that anyone else how their son used to be.