[There was a very good reason as to why Jio showed no signs that he had any inkling as to who Shiro was. He simply didn't know. He came from a planet where the people had more interest to dig through the earth to uncover all the ruins from times passed, compared to gazing at the stars and question if there was anything out there. For all he knew Shin were the only ship able to travel out in space and then it had not left the planet since it first arrived far enough back that it had to be excavated.]

Through a series of events that mainly had to do with us trying to keep the keys to a dangerous weapon away from the last owner of Shin.

[Jio looked around to find a good way back up into the ship. Sure he could probably make it if he jumped, but he had no idea if that would be true for the other. But he did find a few big rocks that were placed perfectly to form a kind of stair and make the distance of the jump more manageable.]

That kind of failed so there was nothing to do but to enter Shin to stop it from consuming the planet.