Tiberi's source was in a prison? That was odd. Even odder was the fact that the transmission's were coming from there. It was so ironic that Earth, of all places, was the place where the supposed Kelbrid infiltration was taking place. As had been said before, Earth was the hub of galactic travel.
Marty was relieved to hear that Tiberi did not intend to send anyone into Kelbrid space. Not that he was frightened or anything, but it didn't seem like a safe or wise decision. "This group would be excellent for espionage purposes in Andalite Space. We could blend in perfectly, in almost any crowd." The potential violence bit made Marty concerned. Observation, even spying, he could do. But he wasn't a fighter. That wasn't exactly his strong suit... never had been. In the earlier years of his schooling, Marty had been picked on and bullied a lot. It didn't bother him much now, but he still didn't like physical confrontation. Was he willing to walk into a dangerous situation, where maybe his and his partners' lives were on the line? People were already committing to this 'plan'; on such short notice, too. Their lifestyles must allow this sort of decision making. Marty could easily be gone from his classes for an extended period of time... he was ahead of his peers by more than a month, anyways. And his family wouldn't worry to much about his little 'trip' either, if he decided to come.
In response to Shaun, as the highschooler with homework was apparently named, Marty said, “Perhaps it's because humans are everywhere. We stick our noses into everything, and are well known to explore and travel more than any other race, generally speaking.” Since space travel had become commonplace, Earthlings had spread themselves well over their solar system, not to mention the rest of the galaxy. “And about a 'summary' of Tiberi's purpose for bringing us here, we are wanted to gather information for him that he cannot safely, or legally perhaps, collect for himself.”
Marty then looks at Tiberius, one of the men he'd looked up to as a model citizen. “I would be glad to help with surveillance and reconnaissance work... but I am worried by the potential danger you mentioned. I am no fighter, and I can promise you, I would not be worth your time if it comes to combat.” Tiberi had already mentioned that Reli and the Corporal, whose name he had not yet learned, had earned their places here due to their military experience. Perhaps Marty would be able to serve only as the tech and information expert, as his own experience and knowledge credentials would suggest.