Alfred "Al" Izuruha
Voiced by: Daisuke Namikawa (Japanese, OVA), Kumiko Watanabe (Japanese, Games), Brianne Siddall (English)
An eleven year old civilian living on a neutral colony, Al (and his classmates) are of the opinion that the war is the coolest thing to ever happen. Encountering Bernie by accident, he teams up with him, not really realizing the stakes involved. The consequences thereof, and his resulting Character Development, are essentially the entire point of the series.
- Cheerful Child: At first.
- Free-Range Children: Al's parents are rarely seen.
- Harmful to Minors: Pretty much his story arc.
- Heroic B.S.O.D.: Al goes catatonic for three weeks straight after taking a blow to the head while trying to stop Bernie and Chris from killing each other.
- Secret Keeper: For Bernie.
- Supporting Protagonist: He's the viewpoint character, but it's Bernie and Chris (and of course, Killing) whose actions actually move the plot.
Bernard "Bernie" Wiseman
A rookie Zeon soldier assigned to the elite Cyclops Team commando unit, Bernie is viewed as The Load by his teammates. However, when it comes down to him and Al as the only ones in a position to save the colony, he steps up and does his damnedest to make it happen.
- Anti-Villain: Heavy on the "anti". He's a perfectly decent guy, it's just that he happens to be working for a fascist dictatorship.
- Char Clone: His blonde hair and shades are likely a Shout-Out to Char's Quattro Bajeena persona, but he's otherwise got none of Char's traits.
- Cool Shades: While in disguise.
- Fragile Speedster: In his Zaku; particularly, we seem him hovering at high speeds like the original series' Dom trying to lure the Gundam Alex into the forest, but both times he's piloting that Zaku he gets shot down pretty easily.
- Miles Gloriosus: Sort of; Bernie tells Al that he's a super-awesome Ace Pilot who's just shy of actually qualifying as an ace, when in reality he's a rookie whose total battle experience is getting shot down in his first fight.
- New Meat: Both to the Cyclops team and in general - the fight in the colony at the end of the first episode is his first deployment.
- Star-Crossed Lovers: With Chris.
- Took a Level in Badass: Just before the end, when he engages the Alex one on one. He actually comes close to defeating it, before taking a beam saber to the cockpit. But even so...the fact that he was able to give a Gundam a run for its money while piloting a Zaku speaks volumes.
- Trademark Favorite Food: Hamburgers. This turns out to be a particularly grim Foreshadowing, as the Federation crew that inspects his downed Zaku describes his corpse as being reduced to hamburger after getting stabbed and cooked alive by the Alex Gundam's beam saber.
Christina "Chris" Mackenzie
Al's attractive redheaded next-door neighbor, Chris is clearly fond of her younger friend. Unbeknowest to him, however, she is actually an Earth Federation officer, and the current pilot of the secret Gundam ALEX undergoing testing in the colony.
- Cool Big Sis: While not actually Al's sister, she fills this role quite nicely.
- Improbable Age: Why'd they choose her as the test pilot again?
- Lightning Bruiser: In the ALEX, which combos speed, offensive power, and heavy armour (including an optional Chobham armour package), with powerful melee and ranged weapons.
- Star-Crossed Lovers: With Bernie, though she's totally unaware of it.
- Took a Level in Badass: By the end, though the climactic fight with Bernie still leaves her in rough shape.
A high-ranking Gihren loyalist planted within Kycilia Zabi's mobile suit team, Killing commands Operation Rubicon from the rear. Convinced that only the total destruction of Side 6 can ensure that the Gundam ALEX never sees combat, Killing constantly pushes for the colony to be subjected to nuclear bombardment, going against his orders to make sure that it happens.
- Armchair Military: Killing never engages in any combat. He stays in the back, directing operations from there.
- Bad Boss: Some commanding officers kill you for failing. Others just don't care about casualties. Killing sabotages his own operation and deliberately arranges for the deaths of his team, solely to get permission for his own plan.
- Big Bad: Directly or indirectly responsible for every horrible thing that the heroes go through in-series.
- Driven to Suicide: Possibly. Side materials reveal that in the last hours of the war, a Colonel Killing A. Danigan shot himself in front of a portrait of Gihren Zabi. Whether they are the same character or not is up for debate.
- Expy: Of his boss, arguably. They're both arrogant, cold-blooded social climbers and chessmasters who murder their way into command positions, authorize the use of WMDs in direct violation of a treaty banning their use, and will do anything to ensure a Zeon victory. Even the character designs are rather similar.
- The Heavy: Killing's actions drive most of the plot, directly and indirectly. Everything Bernie, the Cyclops Team, and Christina and Al go through is either because of, or a reaction to, Killing's actions.
- Insane Admiral: Seriously, what the Hell is in the water at the Zeon command centre? Gihren, Ginias, this guy...
- Karma Houdini: Gets out of the series alive, in a sharp contrast to all of his men; as noted above, however, he maybe commits suicide at the end of the war.
- Klingon Promotion: Shoots his superior officer and takes command of the operation from him when the latter tries to prevent the nuclear assault on Side 6.
- Lack of Empathy: If Killing had any, he couldn't do what he does.
- Names to Run Away from Really Fast: Who names their kid "Killing"?
- A Nazi by Any Other Name: Killing's a Gihren loyalist, meaning his personal philosophy is equal parts Nazi Germany and Imperial Japan.
- Non-Action Big Bad: Killing spends most of the show sitting behind a desk, and demonstrating no combat skills whatsoever. Even whe he offs his superior, it's in a sneak attack at point blank range.
- Nuke 'em: Deliberately sabotages Operation Rubicon so that he can have an excuse to nuke Side 6.
- One Name Only: He's only ever referred to as Killing and whether it's his first name or last name is never made known to us. If he's the same Colonel Killing A. Dannigan mentioned under Driven to Suicide, it is his first name.
- Psychotic Smirk: Seems to be a permanent fixture on his face.
- There Is No Kill Like Overkill: Plans to nuke Side 6 even if the operation is a success, as a way of making sure that the Gundam ALEX is not only destroyed, but buried. This explicitly goes against his instructions to capture it.
- We Have Reserves: Callously plans the destruction of his own team in order to gain permission to nuke Side 6.