Machinima Casting Auditions

Okay, this is my first time doing a casting call for a Machinima. I have been working on this Machinima for a while but cannot find the right people, locally, to be the characters. This Machinima is called "Outbreak." It is about how a planet falls to an Infection that quickly engulfs the planet. It also follows the background stories of three of the main characters.

The first episode script is already corrected but I would like if someone could read it and tell me if everything makes since. I also want a great and detailed critique on the script I want it to be perfect. Anybody that wants to audition or help fix the script I will send it to them. Below is a list of all of the characters in the first episode. If you are interested in one of the characters please contact me.

Characters:
Name - Gender - Color - Personality ( = Main Character, = Show's up later)
Commander Peck - Male - White or Brown - Leader, Daring, Doesn't Give Up Easily
Evey Sanders - Female - Green - Tough, Kind of a B*tch, Sassy, Angry, Quick to judge
Corporal Travis - Male - Black - Smart, Calm most of the time
Pride - Male, Maybe Female - Blue - Tough, Calm, Cocky, Rude to Evey
Heavy Rain Pilot - Female, Maybe Male - Black - Calm, Jealous, Crushes on Peck (Will need name later, Actor picks)
Black Harvest Tech 1 - Male or Female - Black - Like an operator
Black Harvest Tech 2 - Male or Female - Black - Like an operator
Isaac Bates - Male - Black - Tough, Cocky, Rude
Sully Chambers - Male - Black - Doesn't matter till the 3rd episode
Spartan One - Male or Female - White - Soldier-like
Spartan Two - Male or Female - White - Soldier-like
Medic - Male or Female - White and Red - Only screams
Background Spartans - Male or Female - White - Voices in Action

This might be the final list for the first episode. It all depends on what people think about how I wrote the script. Also, you must have a Microphone to audition for any of the characters. Thank you and I hope you would like to audition.