Mikasa Ackerman
Mikasa is one of strongest characters in the story notwithstanding gender. She might be second only to Levi and maybe Eren after he acquired the founder, but let's not forget what Mikasa did to Eren, and how she was inches away from Levi's throat with a blade.
1 Eren Yaeger
By far, Eren is the strongest character in the entire series. All that power, of course, comes from the many Titan forms he's acquired over the years.
Mikasa Ackerman is the main female protagonist in the anime Attack on Titan. She is the adopted sister of the main male protagonist, Eren Yeager, and has a protective relationship over him.
As one of the Nine, the Female Titan is amongst the strongest, and depending on the shifter, it can be a very skilled fighter. This titan can summon lesser titans with its scream, and it can harden parts of its skin for defensive and offensive purposes.
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.
Perhaps the kindest character in the series, Armin Arlert always looks for the good in people. Even after discovering that Annie is the Female Titan, he wants so badly for it to not be true, practically begging her to prove them wrong.
Annie is also known to be very enthusiastic, dedicated, and loyal in her mission as a Titan shifter, to the point that she killed many innocent people to reach her goal (also attempting to kill many of her former comrades), and shed tears when she failed to capture Eren.
Hange Zoë is a Squad Leader of the Survey Corps in charge of the 4th squad, and directs experiments in Titan research. Hange Zoë (ハンジ・ゾエ Hanji Zoe?) was the 14th commander (団長 Danchō?) of the Survey Corps, named so by Erwin Smith before his death.
Armin is one of the few kind and pacifistic characters in Attack on Titan. As a child, he won't even attempt to lay a hand on the local bullies, even as they mercilessly attack him. As the series progresses, though, Armin doesn't have a choice but to accept some of the Attack on Titan universe's harsh realities.
Regardless of the form Attack on Titan's protagonist takes, Thor Odinson can easily defeat him. Despite being in Attack or Warhammer form, Thor can easily call lightning down to the nape of the Titans, eliminating the form and Eren in the process.
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.
Jean immediately develops a crush on Mikasa upon seeing her for the first time, causing him to blush and stutter. He tells her that she has beautiful hair, to which she replied with “thank you”. When Mikasa leaves, Jean follows her, wanting to say something more, but stops at his track when he sees her with Eren.
Mikasa Ackerman - After Mikasa saved a young Louise and her mother during the Battle of Trost, Mikasa left an indelible impression on the girl. After this, Louise began idolizing Mikasa, which ultimately became her primary reason for joining the Survey Corps.
If there's one thing clear about Attack on Titan's Mikasa Ackerman, it is that she is devoted beyond all reason or logic to Eren Yaeger.
After starting the Rumbling, Eren and his army of Titans exterminated 80% of the world's entire population. With this in mind, it seems fair to say that Eren is easily the most evil character in the entire AttackonTitan series.
Zeke Yeager, otherwise known as the Beast Titan or just The Beast, is the main antagonist of the Attack on Titan series.
In the Junior High anime it is heavily implied that Annie has a crush on Eren and the two of them bond over their shared love for cheese burger steak.
Bertolt has been in love with Annie since they were children, and both were Warriors from Marley alongside Reiner. It's unknown if Annie knows about Bertolt's feeling towards her.
Eren needs someone who is kind and patient, first and foremost. He needs someone who can help bring the edge off whenever he's immensely stressed (because this kid has a lot of weight on his shoulders ok) and that can be patient when he might become too irritated or quick to snap.
Silkie is physically the weakest character on Teen Titans. He has a relatively peaceful nature, and, though he has some abilities, they pale in comparison to the others on the show.