Unlike Eren and the rest of the leading cast, Levi is much more fleshed out and charismatic. It's easier to find redeeming qualities in Levi than Eren. He's not the typical "badass" often seen in fiction.
Levi. Voted overwhelmingly as the most popular character in an official poll, with nearly twice as many votes as the main character Eren who was runner-up. Levi's unexpectedly huge fanbase has led to him getting his own spinoff manga with him as the main character.
In Attack on Titan
Levi is known as humanity's most powerful soldier and head of an elite squad in the Survey Corps. Hange remarks that he is a bit of a "clean freak". Captain Kenny Ackerman later notes that the capture of Eren and Historia has to do with Levi, whom he refers to as "Levi Ackerman".
Eren is stronger due to his titan form..but is weaker than Levi in human form. Levi is capable of fighting evenly with Eren even in his titan form.
Canon. Although there are no obvious romantic tones in the pair's relationship in either the manga or the anime and their relationship is only ever described as "friendship," Eren has a strong sense of respect for Levi built up throughout the story.
While there are many characters that he respects, Erwin Smith is perhaps the only character that Captain Levi has truly loved, which puts Erwin at the very top of the list. Levi's loyalty and devotion to Erwin also indicate that the two were meant to be together.
In response to Mikasa's words, Eren promises to always wrap the scarf around her neck as many times as necessary. It's proof Mikasa has always been the person he cared about most in the world.
1 Levi Ackerman
He's arguably the best Ackerman in the anime. Levi's abilities allow him to excel in fighting not just titans but also human enemies. He's also the only non-titan character in the anime to take down a Shifter Titan single-handedly as was shown when he defeated Zeke in Beast Titan form.
Many women love Levi because of his compassion, loyalty and constancy. They love him because he lifted up Hange when she felt insecure. Because he devised a way to protect Eren while Eren was still learning to control his titan power.
The reason why Levi is so strong, fast and agile in combat against anything is because his Ackerman power awakens in that particular moment enabling him to do whatever it takes to win.
However, many find Levi Ackerman to be a very attractive character due to his unique features and personality. He has an intense look in his eyes that draws people in, and he is also known for being a great fighter and leader. Additionally, Levi has a dry sense of humor that adds an extra layer of charm to his persona.
Levi's fighting skills are also cited as one of the reasons for his popularity. His skills with ODM gear are largely unmatched by everyone else in the series. He wasn't given formal training on it like the other Scouts, so it's impossible not to respect his skills.
Zeke, the inheritor of the Beast Titan, is Levi's greatest enemy. The two have fought in many epic battles throughout the series and are very close in strength. In their first battle, Levi hesitated to kill Zeke, allowing him to escape when Pieck saved him.
Rod Reiss' Pure Titan
Considered as one of the most gruesome-looking Titans in Attack on Titan, Rod Reiss' Titan form is very ugly with a huge torso and disproportionate, very thin limbs and head. This Titan drags itself on its belly as it slitters its enormous form around.
Pieck's Cart Titan is arguably the weakest of the Nine, but it comes with several advantages. Unlike its eight brethren, the Cart Titan walks on all four legs, making it an excellent method of transport. Pieck often has large structures attached to her back, which carry both people and weapons.
“But when did try to do that?” Here's what I think: Eren fixed/built/changed the past in order to have the future that he wanted, which is to destroy the world, and he did all of that WHILE having sex with Historia(Because she has royal blood), which leads to him to being the father of her child.
The story initially centers on Eren Yeager with his childhood friends Mikasa Ackerman and Armin Arlert, who join the military to fight the Titans after their home town is invaded and Eren's mother is eaten.
Eren is afraid of his beliefs being shattered. His entire life he has been driven by this idea that is so clearly morally correct, but it is becoming not clear anymore. He has many moments of weakness because he is wavering in these beliefs, as any normal human would.