Out in these nearly century old ruins their little group had found a lost boy. Not some human from before who'd somehow found a way through, but a child who'd likely wandered off from one of the local schools, considering his uniform.
He was lost and scared, clearly having no way to get home. And a search wouldn't head into this area without a bioroid escort anyway, so the trio brought him along. They weren't too worried about any actual encounters, and kept some>