Eren Yeager

"Every day since I came to this institution I've wondered; just how it came to be this way... For me and my comrades... Our minds and bodies are exhausted. Our freedom has been taken away. Even our very identities... If everyone knew they'd turn out like this... I don't think they would agree to ever set foot on the battlefield. But we all have something within that is pushing us, to take that plunge head-first into hell. For most people... That something... Is not their own will. They're forced into it by their environment or the expectations of others; it was never their own choice. But when we choose to immerse ourselves in that same hell willingly... We can see something beyond it... It might even be hope. Or in the end just a hell of another making. You'll never know. If you're not the one who's continuing to take that path... Unless you keep moving forward."

- Eren as he plunges the hole in the Trost District.

"I think...we were born this way. I just keep moving forward. Until my enemies are destroyed."

- Eren to Reiner Braun.

Eren Yeager is the main protagonist of the Attack on Titan series. He is a member of the Survey Corps that happens to be the current inheritor of the Attack Titan and later revealed to be the Founding Titan. Recently, he has become the current inheritor of the War Hammer Titan. He serves as Reiner Braun's archenemy and is the half brother of Zeke Yeager.

While initially presented as a heroic protagonist, Eren later takes on more of an antagonistic role that shows his villainous acts. Most notably is the Marley Arc, where he serves as the main antagonist. From the Marleyan perspective, he is a villain that wishes to declare war on Marley.

He is voiced by Yūki Kaji in the Japanese dub of the anime and Bryce Papenbrook in the English dub.

Personality
Eren is a young man that can be described as being courageous and brave. He is dedicated to both his friends, family and people and very determined to achieve his goals of freeing the world from the Walls. Even as a child, he was always eager of wanting to join the Survey Corps, for the sake of escaping the Walls and exploring the outside world.

Because of his strong dedication, however, this can often lead to his arrogance which ultimately can lead to him making reckless mistakes and decisions that puts him and his friends in great danger. He also tends to have a short temper and can often lash out in anger out of nowhere.

When Eren learns the truth about the world and the Titans, he changes quite drastically. His hatred for the Titans has disappeared and has now taken on a calm and more serious approach. He has fully acknowledged Marley as the true enemy and will go out of his way to stop them, even if it means going out of his way to commit horrid acts such as killing innocent bystanders and causing collateral damage.

Due to his change of personality, Eren has been able to express his relationship with even his enemies. Most notably is Reiner Braun who, despite committing heinous actions that Eren despises him for, was able to relate with him as both him and Reiner are essentially trying to achieve the same goal.

Powers of the Nine Titans
In general, Eren Yeager has access to the basic power and abilities of a Titan. Having access to the Attack, Founding and War Hammer Titans, however, Eren also has special abilities granted from these three Titans.
 * Superhuman Strength: As a Titan, Eren has displayed strength beyond human capablities on multiple occasions. Some of these include carrying a massive boulder over his head and punch Titans hard enough to send them flying back. He was also able to break the Armored Titan's armor at one point, relying on his martial skills.
 * Superhuman Speed: Eren in his Titan form can move at accelerated speed surpassing human capabilities. His speed has shown to rival with that of the Female Titan and the Jaw Titan.
 * Superhuman Durability: Eren in his Titan form has shown to take heavy hits and stand back up on his toes quickly from them. This is notably shown against his fight with the Armored Titan who landed heavy hits on Eren hard enough to send him flying, but was eventually able to get back up in a matter of time.
 * Regenerative Healing Factor: Eren can heal from serious injuries and wounds as both a Titan and as a regular human. He has also shown to be able to stop the regenerating process and hold it for a long period of time, most notably being when he cut off his own leg to play off as an injured Marleyan soldier.
 * Hardening: After drinking Rod Reiss's bottle of "Armor", Eren has gained the ability to harden his Titan form. This ability ranges from hardening his fists to his entire body. His hardened fists are strong and durable enough to break the Armored Titan's armor and can hold massive structures together in place.
 * Titan Communication: With the powers of the Founding Titan, Eren can control an army of Titans by screaming. Because he does not have royal blood, however, he cannot use this ability to its full extent, unless he touches someone of royal blood.

Regular Abilities

 * 3D Maneuvering Skills: Eren initially started off struggling with handling the 3D Maneuvering Gear equipment. However, even when training with a broken one, he was able to keep himself balanced for a short period of time, which Keith Shadis noted as an impressive feat. Eren is commonly not seeing using this gear as he mainly engages in battle in his Titan form, but when using his gear, he displays competent skill with it. Most notably is when he faced off against Bertolt Hoover after returning to Shganshina, where he launched himself in the air and cut him out of the Colossal Titan.
 * Martial Arts: During his time at the 104th Training Corps, Eren would sometimes practice his martial art skills with his friends. One of these notable moments is with Annie Leonhart, who taught him a special trick of evading attacks and pinning your opponent down. These skills would later come in play when taking on the Armored Titan for the first time.

Trivia

 * Eren Yeager and his father, Grisha Yeager, are the only known Titan shifters to have taken more than one of the Nine Titans.
 * Eren Yeager was likely named after the first known inheritor of the Attack Titan, Eren Kruger. Ironically enough, Eren would later use Kruger's last name when infiltrating Marley, presenting himself as Eren Kruger.
 * Hajime Isayama designed Eren's Attack Titan form after Japanese martial artist Yūshin Okami.
 * Eren Yeager is currently the only Titan shifter who's Titan appears to have no special ability of its own.