Pieck has been commended by her comrades for her exceptional brilliance. She is quick to assess a situation, realize the consequences of different decisions, and make a decision of her own on how to proceed. The main reason she inherited the Cart Titan is thanks to her brilliance.
Mikasa/Hitch: ~90 iq.
Mikasa is highly intelligent and, given her ranking, is likely one of the most intelligent alongside strategists like Armin. She's also able to stay cool under pressure and doesn't allow unforeseen shake-ups to faze her.
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.
1 Armin Is A Certifiable Genius
Armin Arlert is so smart that he makes other smart characters look dumb. Armin is the go-to guy for strategies, and his friends can always count on him to deliver them out of difficult situations. With his incredible mind, he's saved the day on numerous occasions.
To save herself and her rescuer, Eren Yeager, Mikasa was convinced by Eren to abandon all inhibition and hesitation, resulting with the "awakening" of the Ackerman powers in her through the Paths, which gave her superhuman strength related to the Titans and allowed her to kill one of her assailants.
Even Titan Shifters saw him as a major threat. During her training days, Mikasa was the strongest soldier in the 104th Cadet Corps so a lot of soldiers already knew about her by the time she graduated. By the end of the manga, she even surpassed Levi as the strongest character from Paradis.
Chapter. Historia Reiss is a graduate of the 104th Training Corps, ranking 10th in the final classification. Historia Reiss (ヒストリア・レイス Hisutoria Reisu?) is the current Queen of the Walls. She is also the illegitimate child of the nobleman Rod Reiss and is the last remaining member of the Reiss royal family.
Yelena meaning “shining light,” is a girl's name of Russian origin. This name derives from the Greek name Helena, which shares the same meaning.
Manga. The Jaw Titan (顎の巨人 Agito no Kyojin?) was one of the Nine Titans with a ferociously powerful set of jaws and claws that were able to tear through almost anything. Due to its small size, it was also known to be the fastest out of the Nine Titans.
The Jaw Titan has multiple users, including Ymir and Falco Grice. This Titan is probably one of the smallest on the list but also the fastest. This Titan is extremely agile and uses its hardened teeth to cut through anything it wishes to.
What Armin lacks in combat strength, he more than makes up for it in intelligence. In a battle of wits against Light, Armin doesn't stand a chance. While Armin might be able to come up with a plan to take down Light, if one thing goes wrong Armin is in shambles.
As we saw in Season 1, Levi was barely able to retrieve Eren from Annie, and he wasn't able to defeat Annie in battle. Who wins in a fight to the death? Levi does, he was destroying Annie when he started to fight her. Mikasa even stated that he was moving too fast for the hardening.
Eren isn't as smart as Light. Light wouldn't go for a reckless plan. Eren, on the other hand isn't even as smart as Armin. Armin, has failed at times and that's why, he isn't as smart as Light.
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.