Jack turned to Grace and was still confused when she asked for his class and build. He had no idea what that meant or how to even answer the question. Bahamut answered Grace's question and he slowly nodded. Now he was starting to understand at least to some level what they were talking about. 

"So, when you say class and build, you mean my powers and abilities? Why didn't you explain that the first time? I can use many forms of magic using the power of my soul which takes the form of a shadow."

 He watched as Ming took her trial then Julia stepped up and introduced everyone as well as explain what was going on. As she spoke he nodded his head. He was starting to really understand what was going on now. He had investigated the strange cracks with Shiro and his friends but none of them knew what they were and they didn't want to get too close to them. Now he was really glad that they didn't. He continued to listen to her and nodded again. He had no problem with staying here. It would give him a chance to explore and the world was in danger anyway, not just this world but all worlds. The thing that concerned him the most was that they were criminals for being summoned here. After she had finished speaking Bahamut asked a few questions. He stepped up and spoke up as soon as he was finished.

"If the worlds are in danger, then we have no time to waste. We should get going as soon as possible, but why is a child in charge? If the situation is so serious shouldn't there be an adult responsible?"

He looked to the others before looking at Julia then slowly he turned to the Ogre. He was ready either way to move on with the adventure and figure out why this was happening.