As the details for The Force Unleashed differ for each form of media it is presented in, this guide mostly uses the novel and the PS3 versions. However, some characters exclusive to other consoles are considered canon, and will be described. A lot of this information is All There in the Manual or according to Word of God.
"He is no Jedi. A Jedi controls his emotions and his powers. But Starkiller... he does not know restraint. He will bring down an entire Star Destroyer on your head, if that is what it takes to kill you."
Juno Eclipse, after being captured by Boba Fett, Star Wars: The Force Unleashed II comic
Born Galen Marek on the Wookie homeworld of Kashyyyk, he was found and adopted by Darth Vader as a small child, after Vader had murdered his father. All his life, he was trained as Vader's secret apprentice, Starkiller. He is Vader's personal assassin, his identity kept secret from all in The Empire. According to Vader, all his training and missions are to prepare him for his greatest task, to destroy Emperor Palpatine, so Vader and Starkiller can rule the galaxy as Master and Apprentice, the way the Rule of Two dictates.
The Ace/The Gift/Born Winner: His first sign of greatness? Stealing Darth Vader's lightsaber with The Force, as a small child. He also somehow learns how to use Force lightning, despite Vader being unable to demonstrate it due to his mechanical body.
Achilles' Heel: In the sequel, Darth Vader considers Juno this for Starkiller.
Bad Powers, Good People: In the sequel he still can use lightning and his use of Jedi Mind Trick borders dangerously close to Mind Rape, considering that he uses it to make mooks attack each other or even commit suicide. Despite all of this, he has still turned away from the dark side and is dead set against going back.
Evil Counterpart: He's what Luke Skywalker would have been if he had joined or been raised by Vader. He also has one in the form of The Dark Apprentice, another clone successfully turned to the Dark Side by Vader.
Good Counterpart: Let's see: a person found as a child to be incredibly powerful in The Force, forced to leave his home behind and subjected to rigorous training and pressure, has a droid as a companion, driven by a love for a non-Force sensitive but extremely beautiful Action Girl... yes, he's Anakin Skywalker if he hadn't been ruled by hubris, hate, and ambition.
Fate Worse Than Death: In the non-canonical Dark Side ending, he kills Darth Vader, but Palpatine drops The Rogue Shadow on him, then rebuilds him as a cyborg, forced to do his bidding like Vader once did.
Genre Savvy: The novelization of the second game makes a point that while Starkiller's purpose is still to Always Save the Girl no matter what, he is careful to avoid falling onto The Dark Side, as Juno most likely would not want to remain with the monster it would make of him.
His evil clone, the Dark Apprentice, wears this too.
I Surrender, Suckers: A gambit he pulls in the novelization of the sequel. In the final battle, he has an epiphany and allows Vader to disarm him. Vader puts his lightsaber to his throat and declares victory. Starkiller then blasts Vader with Force Lightning at point-blank range.
Limit Break/Super Mode: Force Fury in the second game. Normally, it only lasts about 20 seconds, but it lasts indefinitely in the Final Battle, which is understandable as it runs on Unstoppable Rage and Starkiller is pissed that Darth Vader pushed Juno out a window and seemingly killed her.
Love at First Sight: Upon seeing Juno for the first time, though it takes him a while to understand his feelings.
Not So Different: Starkiller actually states this to Vader during their final fight in the novelization, regarding being used and enslaved by the Emperor, and likewise expressed pity on Vader for not breaking free.
Reverse Grip: His standard stance. While he has studied all seven forms of lightsaber combat, he favors the Shien style.
Scarf Of Asskicking: The "heavy" varient of his training robes (pictured above) includes one of these, which he wraps around his neck and lower head to protect himself from the environment on Raxas Prime, draping the excess down his back.
Unwitting Pawn: Vader may have never planned to destroy the Emperor, and even if he did, he certainly would not have let Starkiller help. Starkiller's true purpose was to gather the rebels in one place so they could all be arrested in one move.
Yin-Yang Bomb: Starkiller blends Lightside and Darkside techniques in battle, like an unrefined version of Vaapad.
You Have Failed Me: In The Ultimate Sith Edition, he pulls this on the incompetent Captain Keenah, Force Choking him to death over the radio.
You Have Got to Be Kidding Me!: In the novel for the sequel, Vader tries to convince him to team up against Emperor Palpatine and Starkiller gets exasperated that Vader would try that after betraying him so many times and hurting Juno.
Voiced by: Nathalie Cox
PROXY: Captain Juno Eclipse. Born on Corulag, where she became the youngest student ever accepted into the Imperial Academy. Decorated combat pilot with over one hundred combat missions and commanding officer during the Bombing of Callos. Handpicked by Lord Vader to lead his Black Eight Squadron, but later reassigned to a top-secret project—
Juno: Is there a psychological profile in there, too?
PROXY: Actually, yes, but it's restricted.
Star Wars: The Force Unleashed
Born on Corulag, Juno was raised to believe The Empire's propaganda of Palpatine's rule being benevolent and of the Jedi being evil traitors. She is one of the youngest cadets in The Empire's history, being accepted at age 14. After graduating, she rose through the ranks in the Imperial fleet, until joining the Black Eight Squadron, Darth Vader's personal elite unit of TIE fighters. Recently she was reassigned to a top-secret mission: to be Starkiller's personal pilot for his ship, The Rogue Shadow.
(to Boba Fett) "He is no Jedi. A Jedi controls his emotions and his powers. But Starkiller... he knows no restraint. He will bring an entire Star Destroyer on your head, if that's what it takes to kill you."
(to Boba Fett) "Your contract with Vader will last only as long as it serves The Empire. Eventually, you will be an outlaw too. And then, Vader will be hunting you."
Well Done Daughter Girl: Her years of service to the Empire were all to get her Jerkass father (an Empire and Palpatine fanboy) to be proud of her. It didn't work, and he never even showed up to her graduation ceremony.
"I had hoped using an older training module would catch you off guard and allow me to finally kill you. I'm sorry I failed you again, Master."
PROXY, on being defeated by Starkiller after using his Obi-Wan module
A droid Vader gave to Starkiller as a training aid/assistant. Helping Starkiller is only his secondary directive; as Vader is the master of giving Training from Hell, his objective is to kill Starkiller. Every once in a while, he ambushes Starkiller, only stopping if Starkiller lands a death blow. It is explained in the novel that his usual reasons for ambushing the Apprentice are to help Galen blow off steam when he's upset since There Are No Therapists. It is also briefly mentioned that PROXY is the one who raised Galen after the boy had been kidnapped from his home by Vader.PROXY can use holographic technology to imitate nearly any being, and uses this to impersonate Sith Lords and Jedi Knights while dueling Starkiller, give information on assassination targets, or relay messages from people.
Brainwashed and Crazy: In the novel, as well as some versions of the game, PROXY patches into The Core, a computer intelligence that runs the junkyard planet they were on. The Core retaliates and takes over PROXY making him attack Juno.
Freudian Slip: PROXY's holograph malfunctions in the novel of the sequel could be considered this.
Heroic Sacrifice: After his primary programing was fried, PROXY took it upon himself to distract Darth Vader long enough for Galen to get away with his life after being betrayed by the Sith Lord. He is eventually rebuilt in the sequel.
Nice Guy: Being not programmed to understand the consequences or even the concept of death, he is a truly sweet fellow who loves his friends dearly even when following his primary directive to kill them.
Obliviously Evil: Though it's hinted many times in the novel that PROXY has a genuine fondness for Starkiller (and later Juno too), he still falls under this category because he really is trying to kill Galen every time they fight.
Though unintentional, he does it to Vader too in the first game by attacking him as Obi-Wan Kenobi so Starkiller can escape. It doesn't do much in the game, but in the book, it catches Vader off guard.
"Vader thinks he's turned you. But I can sense your future—And Vader isn't a part of it! I sense— I sense only... Me?''
Kota, during his duel with Starkiller
Born on an unnamed war-torn planet, General Kota had fought in the trenches since he was 10-years-old. A Jedi commander in the Clone Wars, Kota distrusted the competence of clone soldiers and preferred to rely on his own men as his troop. Because of this, he escaped execution from the infamous Order 66. After years of hiding where he still kept in contact with surviving Jedi, Kota finally surfaces to wrack havoc on the Empire and try to draw out Darth Vader.
A Father to His Men: His militia are loyal to the end for him, and he specifically chose natural soldiers recruited from even the Separatists because he felt that clones were untrustworthy, which ended up being well founded due to Order 66.
The Alcoholic: Descended into alcoholism when his sight was taken from him.
Kota: You're a Jedi, boy! Size means nothing to you!
Obfuscating Stupidity: Even after being blinded and binge-drinking, he's actually as wise and as powerful as he ever was. At the end of the game, he admits to Juno that he sensed who Starkiller was the whole time, and just pretended to not recognize him.
The Obi-Wan: Guides Galen to the light side of the Force.
Kota: Ha. A boy? Months of attacking Imperial targets, and Vader sends a boy to fight me?!
Verbal Tic: He almost always calls Starkiller "boy".
Voiced by: Matt Sloan
As The Emperor's Apprentice, his mission is to hunt down any Jedi who escaped Order 66, as well as any rebels. Finding a powerful, Force-sensitive child named Galen Marek, Vader violated the Rule of Two by taking him as his secret apprentice, Starkiller. He is preparing Starkiller for the day he destroys his own Master, and takes over as Emperor of the galaxy.
Alas, Poor Villain: In-Universe example from the Novel: Starkiller expressed pity on Vader for his being unable to successfully free himself from Palpatine's grasp, even stating that he intends to put Vader out of his misery.
Imperial Commander: Lord Vader? We were ambushed upon arrival, but I have the situation well in- (is Force Choked)
Also subverted in the same quote, as he actually spares the commander in question (although the Wii version makes it a bit more ambiguous as it cuts to right behind Vader after releasing his grip), although only because he arrived at Kashyyyk for a very different reason.
Darth Vader: I have no interest in your failings, commander. I am here on a mission of my own.
The Corrupter: He wants Starkiller on the dark side and will allow nothing to get in the way of that goal.
Determinator/The Übermensch/The Unfettered: Nothing can stop him from having his own apprentice, not even death itself. Also, credits, starships, and Imperial lives are all meaningless to him, he will expend any resources he has to complete a goal.
Enemy Mine: Starkiller actually tries to invoke this in order to get Darth Vader to join the Rebellion since both sides want the Emperor dead. Darth Vader's reply to the offer is downright venomous, he rejects the notion of seeking their help to realize his plans.
Get Back Here Boss: In the sequel, the first stage of his battle has him jumping from platform to platform.
Hoist by His Own Petard: In the Wii version of the sequel, he throws one of his cloned mooks at Starkiller, only for him to miss and blow up a power pylon. He then attempts to kill Starkiller by throwing him right into the pylon's energy spike, only Starkiller to evade it and shove him into the pylon. Surprisingly, he survives this.
I Lied: After betraying Starkiller, Starkiller asks about their plan to defeat The Emperor. He replies with this.
Technically it was a half-truth. He did plan on betraying the Emperor, that much was true, but he wasn't planning on having Starkiller do so.
The bios and some statements by those involved in LucasArts imply that Vader did genuinely intend to betray the Emperor with Starkiller on his side, but he apparently chickened out at the last moment.
In the sequel, he lied about the cloning process not being perfected.
I've Got Your Girl: Tries to lure Starkiller back to him in the second game by kidnapping Juno.
Vader: (releases the force choke on Juno ) Find and kill General Kota. If you refuse, the woman dies. You will return to me and give yourself to The Dark Side. If you resist, she dies. And when your training is complete, you will hunt down and execute the rebel leaders. If you fail, she dies!
Shapeshifter Guilt Trip: In the sequel, he tests Starkiller's commitment to The Dark Side by having him battle robots disguised as members of the Rebel Alliance. Starkiller can't bear to attack the Juno droid and fails the test. The Dark Apprentice pleases him by striking down the Juno droid without hesitation.
In the sequel's novel, Vader sends the droids against Starkiller when he returns to Kamino, but he finally realizes they are just enemy droids and destroys them all.
(while giving Starkiller his next mission) "My spies have located another Jedi. Kazdan Paratus is far more powerful than you. I do not expect you to survive. But if you destroy him, you will be one step closer to your destiny."
The dark Sith Lord who founded the Galactic Empire and nearly exterminated the Jedi. Also goes by Darth Sidious. Considered by many to be the most powerful Sith Lord that ever lived. He turned the young Jedi Knight Anakin Skywalker to the dark side and named him, as his apprentice, Darth Vader.
Nice Job Fixing It, Villain: His Xanatos Gambit kind of backfired. It did provide important information that would be used in the trilogy but the main goal of wiping out all the rebels at once was a total bust.
Shout-Out: You know the badass boast above, "You will scream like your father!"? Well, that's almost a direct paraphrase of what Andross said to Fox before fighting him in the easy path of Star Fox 64.
You Killed My Father: Although Vader was directly responsible for actually killing Galen Marek's father, Palpatine confirms Starkiller's suspicions that Palpatine was actually behind Kento Marek's death in the first place.
Voiced by: Susan Eisenberg
A Togruta Jedi Knight who survived Order 66 by taking refuge on the jungle world of Felucia. Noting the natural Force-sensitivity of the natives, she struggles to train them, along with her padawan, Maris Brood, in order to resist The Empire.
The Zabrak padawan of Shaak Ti. She spent many years in hiding with her Jedi Master on the planet Felucia. After her master's death, she turns to the Dark Side of the Force, along with the rest of the planet.
A Jedi Knight who quietly resigned from the Order after falling in love and marrying a fellow Knight named Mallie (the Jedi Order forbids romantic relationships), thus escaping Order 66 by sheer coincidence. Settling on the Wookie homeworld of Kashyyyk, he had to raise his son Galen alone after Mallie died, but became a respected comrade to the Wookies. Sadly, when Darth Vader arrived, Kento was defeated and killed. Vader abducted Galen, making him his apprentice. Eventually, his Force Ghost appears before Starkiller to apologize for his failure to protect his son, and to face him in battle for Galen's Trial Of Flesh.
Ancestral Weapon: Starkiller eventually finds his broken lightsaber and uses its blue focusing crystal when constructing a new one.
Blood Knight: In his backstory, he eagerly joined the Clone Wars, seeing the conflict as a chance to test his skills, and relished in the fighting. When he met Mallie, she called him out on this, leaving him ashamed of his foolishness and un-Jedi-like behavior.
Unskilled, but Strong: He only knew Shii-Cho, the beginner's lightsaber style taught to younglings, along with a little bit of Makashi. However, he was so strong that he could pull TIE fighters out of the sky with The Force.
Served in the Galactic Senate as the Senator of the Alderaan and now serving in the Imperial Senate after the founding of the Galactic Empire. He has earned a reputation for speaking out against the Emperor and his policies. He is Princess Leia Organa's adoptive father and a friend of Jedi Masters Obi-Wan Kenobi, Yoda, and Rahm Kota.
"It is settled then. My wealth will fund the Rebellion, while Garm provides our fleet, and Mon Mothma our soldiers. And with you leading us, we have the power of the Force on our side. Therefore let this be an official declaration of rebellion! Today, we all vow to change the galaxy, and one day the galaxy will indeed be free!"
Princess Leia Organa
Voiced by: Catherine Taber
Daughter of Senator Bail Organa and a princess of Alderaan. She has a forceful personality and bright intellect, sharing her father's attitude in defying the Empire. Leia is no stranger to danger is willing to risk her life in what she believes in, doing all she can to help her father.
Distressed Damsel: Was being used as a hostage by the Empire to ensure her father's corporation and had to be rescued by Starkiller.
A Mandalorian warrior and bounty hunter who is a clone of the famed Jango Fett but was raised by Jango as his son. When Jango was killed by the Jedi Mace Windu in battle, Boba took up his father's mantel despite his youth. Years later, he is regularly employed by Darth Vader and the Empire to track down particularly tricky targets and bring them in alive.
A disgraced Aleena Jedi Knight who only survived Order 66 because he fled in fear, abandoning his comrades to be slaughtered. Settling on the junk planet Raxus Prime, his guilt and isolation has caused him to descend into madness, building a replica of the Jedi Temple and speaking to statues of the Jedi Council as if they were alive.
The commander of the Imperial outpost on Cato Neimoidia. He uses his influence and power to run a successful slave-trade business, which helps create the bulk of the Empire's laboring workforce used to build outposts on subjugated planets. To further increase his wealth, Tarko established gambling casinos on Cato Neimoidia. He used the money generated from that venture to fund and build a massive arena, which features gladiator combat for both sport and profit.
We Can Rule Together: When he sees how powerful Starkiller is, he tries to recruit him as a gladiator, even offering to provide him with luxuries and women if he would accept. Starkiller ignores the offer.
One of the most renowned and powerful Jedi Masters in galactic history, who is known for his legendary wisdom, mastery of the Force and skills in lightsaber combat. When the Republic collapsed and was replaced with the Galactic Empire, Yoda went into hiding on the remote swamp world of Dagobah. He was a past teacher for Obi-Wan Kenobi, and Rahm Kota.
A long dead Pau'an Sith Lord from ages past. He was once a Jedi, but turned to The Dark Side, his true name forgotten and lost to history. He gathered an army, savagely waging war until he was finally overwhelmed and killed. He lives on as a Force projection in the abandoned Jedi Temple on Coruscant. Darth Vader eventually sends Starkiller to face him in battle for his Trial Of Skill.
A long dead Theelin Sith Lord from ages past. She nearly conquered the galaxy, and was so dangerous that the Jedi and Sith were forced into an Enemy Mine in order to take her down. She lives on as a Force projection in the abandoned Jedi Temple on Coruscant. Darth Vader eventually sends Starkiller to face her in battle for his Trial Of Insight.
Shape Shifter Guilt Trip: When Starkiller arrives, she imitates an injured Juno, then attacks him when he tries to help her. She adopts Juno's form a few more times to try to get Starkiller to hold back. When she's defeated, she takes the disguise one more time in a desperate attempt to stop him from killing her, which fails miserably.
A Mon Calamari from the water world of Dac, Ackbar was the leader of the resistance against the Empire there long before the Rebel Alliance formed. He was captured when his people were betrayed by an insider and he was force to serve as a slave to the high ranking Imperial officer, Wilhuff Tarkin. In a raid by the Rebel Alliance, Ackbar was eventually freed and is now serving under their crest to try and free his planet and the galaxy from the Galactic Empire.
Distressed Dude: In the backstory, it's mentioned that Ackbar was rescued from slavery by the Rebellion.
Heavy Worlder: Malastare's gravity is extremely high, so he's become very strong from living there for over a decade.
Laser-Guided Amnesia: Starkiller is trying to avoid news of his resurrection getting out, but Shyre figures out who he is, causing Starkiller to panic and use the Jedi Mind Trick on him to make him forget.
Romantic Runner-Up: He's attracted to Juno, who sees him as a perfectly good man. However, Shyre simply can't match up to Starkiller, or his memory.
A Rebel Corellian pilot with a daredevil attitude and the skills to match.
Badass Normal: He's not Force-sensitive, but he can pilot like the best of them.
Badass Bystander: He meets Starkiller during a battle when the rogue apprentice randomly jumps on his Y-Wing for a ride. Any other pilot would have gotten themselves killed doing the stuff Galen asked of him.