Here are "some" of the characters in Astro notice how I said "some". From left to right.

The Ordinary Guy- Is the main character in this story that disobeys his boss and takes a short cut through an asteroid field on the way to sector Mairus and wrecks causing him to crash land on an uncharted planet.
Tog- Is a alien that he runs in to and make friends with. Tog is very experienced with Lem and teaches the Ordinary guy how to use them.
His Boss- Doesn't know much but when he finds out he crashed on a plant hes going to have a melt down but, if he finds out the planet is uncharted then he might get greedy.
The Vice Pres.- Is trying to take over the company.
The Fatel Bros.- Are two cruel, evil, greedy Aliens that treat there Lem like slaves and crap. They also want to kick the ordinary guy off the planet using big wepons.
Lem- The little hopeless helpers that come in different kinds.