Name: Eren Yeager | Attack Titan/Founding Titan/Warhammer Titan

Origin: Attack on Titan

Height: 6'0" (Human) | 13'1" (Titan)

Weight: 180 Ibs

Gender: Male

Age: 15 (Pre-Timeskip), 19 (Post-Timeskip)

Classification: Human, Titanshifter, Inheritor of the Attack, Founding, and Warhammer Titans 

Theme:

https://youtu.be/MI-lLdeWQA8

FEATS:

-Eren has the highest Titan kill record by far of all the former graduates of the 104th Trainee Squad, though it is mostly in Titan form as he only killed one as a human with the 3DM gear.

-Ranked 5th among the 104th Cadets, under the three Marley Warriors and Mikasa Ackerman, the former of which trained extensively prior to their arrival and Mikasa possessing near-superhuman qualities.

-Took two human lives at age nine, justifying his actions as killing "animals".

-Defeated the Female Titan

-Helped kill Rod Reiss's titan, which stood 120m tall

-While fending off the Jaw Titan at the same time, defeated Ms. Tybur in Marley and inherited possession of the War Hammer Titan by consuming her remains.

-Defeated the Colossal Titan with Armin's help

-Infiltrated Marley's capital and killed their heads of office with his Titan form

-Convinced Ymir Fritz to awaken the Wall Titans and grant him full control of the Founding Titan

-Wiped out a large majority of humanity with The Rumbling

-Most recent titan form capable of matching Armin's Colossal Titan twice

-Led an army of Colossal Titans against Eldia's enemies

-The symbolic leader of the Jaegerists, who rebel against the Alliance to create a 'New Eldian Empire'

Junko: Titans. In Greek Mythology, they were a race that used to be at the top of the food chain and did whatever it took to keep it that way, even if it meant eating those they deemed beneath them.

Monika: And if you ask Eren, he'll tell you the Titans he deals with are no different.

Junko: Eren Yeager was born in the Shiganshina District of the outer Wall Maria to Karla Yeager and Grisha Yeager, a doctor. It was the only place where the last traces of humanity took refuge in after the rise of the giant man-eating monsters called Titans.

Monika: Inside the walls, Eren lived quite a peaceful life, even having a blonde best friend in Armin.

Junko: I don't know if it was that peaceful. By the time he was nine, he already killed two grown men for kidnapping Mikasa and killing her parents. 

Monika: Well... yeah but they deserve it. Plus he got a new stepsister out of it right?

Junko: Right...

Monika: ... Okay fine, it was somewhat peaceful. So long as those monsters roamed outside those walls, everyone will always live in fear. This really sucked for Eren who always wanted to see the world outside the walls.

Junko: You know what also sucked? Watching a giant Titan break through that wall and let hundreds of other Titans destroy his home in a beautiful massacre!

Monika: Only you would find that "beautiful". As a result, he watched the death of his mother and his father had mysteriously disappeared. Now with a newfound bloodlust and a thirst for vengeance, Eren joined the military and made it his life mission to kill all the Titans.

Junko: And man was he determined or what?

https://youtu.be/pcwSA0VTCto

Junko: As a human, he's pretty tough, cutting Titans down a size with ease. He beat the crap out of Armin, held open a Titan's mouth, and even kept fighting after being impaled and bleeding severely! Not even being shot in the head and beheaded is enough to stop him!

Monika: Originally, Eren's only noteworthy trait was his natural physical strength, which stemmed from having to defend his friend Armin from bullies who were bigger and stronger. As he grew and joined the 104th squad, he trained extensively in hand-to-hand combat. After additional training with Reiner and Annie, Eren's prowess and skill set diversified, including the use of punches, throws, grappling, and submission locks. He also had the best scores for hand-to-hand combat of the entire 104th graduate squad.

Junko: Too bad hand-to-hand combat is pretty useless against Titans hundreds of times your size. But luckily for Eren, he's got his trusty old 3D maneuvering gear.

Kokonoe was hooking the gear onto Junko.

Kokonoe: This set of gears was designed to allow greater mobility when fighting Titans, letting Eren move faster than the eye can track. It takes the form of a harness that holds most of the body below the neck.

Junko: Oooh!

Monika: Um careful Junko. Without special training for that maneuvering gear could tax the user's muscles.

Kokonoe takes out a manule.

Kokonoe: Let's see... this thing contains hand grips, piston-shot grappling hooks, and an iron wire propeller with plug-in blades. 

Junko: Hey, what does this do?

Junko shot a grappling hook and sent herself flying out of the building.

Kokonoe: ... She'll be fine. Anyway, the blades are made of reinforced steel, letting them cut through the bodies of Titans with ease.

Monika: But if the target's body is stronger than reinforced steel, Erin can instead use the Thunder Spear.

Kokonoe places one on a table.

Kokonoe: These were made as a sort of miniature missile to bypass the armor of the Armored Titan, which is tough enough to smash through walls and tank cannonball fire.

Monika: Though you'll have to be careful when using one of these. Standing too close could blow you to smithereens.

Junko came back and saw the Thunder Spear.

Junko: Hey, what does this do?

Junko pulls the pin and it launches into Kokonoe.

Kokonoe: MEOW!!!

It sends her crashing outside and blowing up in her face.

Junko: ... She'll be alright.

Monika: Anyway, you probably wonder why Eren doesn't use these things often? In fact, he's only ever really killed one Titan with his gear. 

Junko: Right. Eren didn't need some gear to kill Titans because he was already special. How special you may ask? Well, it all started when he was eaten by a Titan and died... the end.

Monika: Or so you would think... but then he woke up only to find out he had turned into a Titan.

https://youtu.be/IVRnpouaR-U

Junko: To make a long story short, Eren's father wasn't exactly the father of the year. After the death of Eren's Mother, his father put a Titan serum into Eren's body, turning Eren into a titan and letting him eat him! That's right, Eren ate his own father! 

Monika: Well, it allowed for Eren to take control of his Titan body and now he can go in and out of the transformation at will. 

Junko: As a Titan, Eren keeps that speed that he would normally get with his maneuvering gears. His strength also increases tremendously. Now he can lift giant boulders, destroy whole buildings, and even contend with other powerful Titans like the Female Titan, Collasal Titan, and Armored Titan! Hell, he's even broken the armor of the Armored Titan!

Monika: As a Titan, Eren has killed over 20 Titans in the Battle of Trost alone and even helped kill Rod Reiss's Titan, which stood 120m tall. 

Junko: Of course, there are other benefits to being a Titan.

Monika: Like every Titan, Eren has a strong jaw that helps with devouring humans and Titans alike. He also has a healing factor that lets him recover from just about any wound almost instantly. Even lost limbs will just grow back.

Junko: Yeah, so long as his human body, located in the back of his neck, is safe then he'll also be just fine. His human body has the same healing factor but regenerating from lost limbs takes a lot more time.

Monika: And he's ingested a bottle labeled "Armor" from Rod Reiss' bag, giving his Titan form the ability to harden and produce pillars. Like the Armored Titan, he's able to form diamond-hard crystals around his knuckles for added striking power and hardening his limbs to tank hits more easily.

Junko: If that's not enough, he can catch fire in a berserker rage and even see the future!

Monika: Well, it's more like because he has the Attack Titan, he's granted the shared memories with all other holders of the Titan in the past and future. This allows him to remember details from the perspective of every other holder of the Attack Titan and learn important information, allowing him to bear witness to his father's entire life story from his perspective.

Junko: Though since he has no royal blood in him, he needs to be in contact with someone of royalty to see those past and future memories. That is exactly what happened when he kissed the hand of Historia... and potentially had her kids later on.

Monika: Right- wait what?

Junko: Oh come on, those kids look nothing like that nameless farmer. Eren makes more sense as the secret father. But that's just a theory... a-

Monika: Stop putting your ships in our Death Battles...

Junko: You're no fun...

Monika: Still, seeing his future did change Eren.

https://youtu.be/xOKWJL9OeLM

Monika: After learning about the Titan origins and learning the history of Marley and Eldia, Eren's personality began to change. What once was a simpleminded young soldier who would do anything to protect his friends had turned into a more... cold-hearted individual who would do anything to achieve his goal, even if it meant putting his friends in danger.

Junko: On the bright side, he's not as reckless anymore and is more strategic than he used to be. He also knows how to manipulate others and get into their heads. You see, he learned that it was Marley responsible for all the Titans, trying to keep everyone in Eldia within the walls because they really... really hate them. So Eren decided there was only one thing he could do. Murder everyone...

Monika: And he started this master plan by going to Marley, attacking it, and eating the Warhammer Titan, Lara Tybur. By eating her, Eren managed to gain her powers.

Monika: With this power, Eren can create and manipulate constructs made out of ultra-durable titan crystals, the same material as hardened titan skin. He can do things such as summoning massive stakes from the ground or fashioning them into deadly weapons such as hammers, pikes, and even complex weapons such as crossbows.

Junko: But that just wasn't enough, was it? So with the help of his brother, he unlocked the power hidden deep inside him... The power of the Founding Titan.

Junko: Okay, what the fuck is that?!

Monika: That is the Founding Titan, or as most like to call it... the Doomsday Titan. 

Junko: How does he even move like that?

Monika: There are legs in the back. Eren actually took this form after Ymir granted him the full power of the Founding Titan. Before this transformation, he could already see the past and future as well as control other Titans so long as he had contact with royal blood. 

Junko: Now both of those abilities have been increased! 

Monika: When using the Founding Titan's abilities, Eren can access the Coordinate of intersecting Paths, which connect all Eldians, their memories, and by extension, all Titans. Through this, he can manipulate events within Titan Shifters' memories, regardless of time, and he gains complete control over all Eldians and Titans, allowing him to control their memories, spontaneously transform any Eldian into a Titan, and command any Titan to do his bidding.

Junko: It's also how he took control of all those Colossal Titans right?

Monika: Actually, those are Wall Titans, similar to Colossal Titans in size and power but larger in number. Eren has undone all forms of titan hardening around the world in an instant, which awakens the Wall Titans all at once and inadvertently frees Annie from her long imprisonment. He is also shown to be able to summon the titan bodies of any previously dead Titan Shifter to defend him or fight on his behalf, including Porco Galliard's Jaw Titan and Bertholdt Hoover's Colossal Titan. These bodies appear to be hollow copies completely under Eren's control, since they do not appear to be able to think for themselves or display any form of complex intelligence as normal Titan Shifters are able.

Junko: So with his newfound power and the help of his terrorist group, the Jeagerist, Eren began the Rumbling, murdering over 80% of the population!

Monika: That kill count ranges from 21.9 to 51.3 million people. Though that's just an educated guess.

Junko: Puhuhuhu... millions of families and friends slaughtered. Innocent lives screaming in despair all because one man went into his emo phase! This cycle of hatred will never end! And after he lost his Founder's powers, he managed to transform into a Colossal Titan!

Monika: Wait... but how?

Junko: Honestly, who knows? Maybe it's something his Attack Titan can do? Maybe he used the last bit of his Founder powers to become that? The details don't really matter, do they? All that matters is that he can turn into a living nuke just by going into this transformation!

Monika: Right. And his immense size makes it a lot harder for smaller enemies to get the drop on him. You know, because he's up to 60 meters tall. He can also release immense heat from his body that reaches over 600 degrees.

Junko: But even with all of this, he's not unbeatable.

Monika: While Eren is no longer hot-headed and is a lot more calm and collected, he can still be a bit reckless at times. Also, he does have a limit to his stamina, and using the Titan Hardening or Warhammer powers will drain him. 

Junko: And he can be killed if the one meter long and 10 centimeters wide area of his nape where his body resides is cut. Though in the Founding and Colossal Titans, his head is more than likely in the Titan's mouth. That was definitely the case when his old teammates worked together and Mikasa, one of the very few who still loved him, cut his head off and ended his entire massacre... actually, why did he start this whole thing?

Monika: Why? Well, even Eren doesn't fully understand that himself. In actuality, he never hated Armin and he genuinely loved Mikasa... all he really wanted was to create a world where he and his friends can live freely. But once he started his rampage he knew there was no turning back. The world will never forgive him for what he's done.

Junko: Well, at least he united Merley and Eldia against him, bringing peace between their people at the cost of millions of lives. And the good news is... he doesn't need to pay child support!

Monika: For crying out loud, Eren is not the father of Historia's children!

Junko: Let me have my headcannons dammit!

Eren: The rumbling will not stop. I won't let fate decide Paradis's future. I will keep moving forward. In order to gain my own freedom, I will take freedom away from the world. But I won't take anything from any of you. You are all free. You have the freedom to defend the world's freedom. And I have the freedom to continue moving forward. So long as we both have our unbreakable conviction, we will collide. There's only one thing for us to do. Fight. If you want to stop me, then try to stop me from ever taking another breath. You are all free.