The little ones from the F-Class didn't notice when their seniors who left before had returned. The two of them just suddenly appeared from behind like ghosts and only when they interfered in their conversation did they realize that there was someone else with them in this training hall. They were just talking about space storage devices and Xue Laira voicing that she wanted one and then the Young Prince of the beastmen race speaking up telling her what he wanted as payment for one space storage device.
In reality, Xue Laira is tempted. However, all spirit tamer knew the importance of the Spirit Realm Door to them. It's the only connection she has with the Spirit World where her elementals live. That's why to keep the safety of her elemental she couldn't help but ask a few questions to Young Prince Hei.
Xue Laira asked, "Senior Hei, does this access need to be permanent or only one time?"
