Mikasa got the scar on her face during the battle for Trost District when Eren, in his uncontrolled Titan form, accidentally swung at her, and debris from the impact grazed her cheek as she dodged. It happened as she was trying to reach Eren to snap him out of his rampage, and the scar serves as a lasting physical reminder of his loss of control and the danger he posed, even to her.
Back at the boulder, Eren, in Titan form, has seemingly lost his mind and is attacking the soldiers assigned to escort him. Mikasa jumps out of the way, narrowly missing Eren's attack but receiving a scar on her right cheek in the process.
Mikasa did NOT marry or have any kids.
That's why after Eren's harmful words that killed everything Mikasa has believed so far, she stops wearing her scarf, but her scar remains.
We all know that Eren asked Mikasa to cut her hair so it wouldn't hinder her from using the Maneuvering tool. We noticed that after a while, his hair became longer and Mikasa's hair became shorter, and he didn't cut it.
Eren offered her freedom and infinite choices, Ymir doesn't know what to do with this, so she cries.
After the end of the manga, we learnt that Eren killed 80% of humanity and the 20% of it mostly lived in Paradise Island. What was believed to be a lie at the start, turned out to be a reality in the end.
Honestly, those who actually read the manga understand everything clearly—Mikasa didn't marry anyone. In the final scenes of the manga, it's shown clearly that even when Mikasa grew old, she still held the Azumabito clan's secret family symbol in her hand. Even at the time of her death, she was holding it.
Mikasa's red scarf isn't just a red scarf, it's warmth in a cruel world, a promise of home, a symbol of love, freedom, and the strength to keep moving forward even when everything is taken away.
While Mikasa's feelings towards Eren were pretty evident, Eren only confessed his love for Mikasa at the conclusion of the series, making it one of the most tragic love stories in the anime and manga world.
The Simple Reason as to Why Mikasa Kissed Eren's Head. In the end, the message is clear. Mikasa kissed Eren because she loved him, and she never stopped doing so. Her affection transcended the chaos of wars and the formidable powers of Titans.
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.
While he appears distant, Eren may be the father of Historia's child, and there is a huge detail that implies that. Notably, Historia became pregnant before Eren departed for Marley, and the child arrived ten months later—a timeline aligning with the typical duration of pregnancy in Japanese culture.
Why can't Mikasa turn into a Titan? The main reason why Mikasa can't turn into a Titan is because she is not a descendent of Eren, which the anime doesn't really go into but, instead, merely alludes to.
Eren gave Mikasa his scarf after she saved him from human traffickers who had killed her parents. The scarf became a symbol of Mikasa's promise to protect Eren, and it held sentimental value for both characters throughout the series.
Mikasa shows her the Azumabito family crest tattooed on her wrist and is complimented on this. She reveals that Mikasa is the last descendant of a Shogunate branch that had settled upon the island, and is therefore directly related to the Azumabito family.
In Attack on Titan ANSWERS, Hajime Isayama stated that "[Mikasa, Levi, and Kenny] are all part of the same Ackerman bloodline. However, their reasons for protecting their respective counterparts do not have anything to do with the bloodline itself—it is just their nature."
Louise laments that she will not be able to see the fruition of Eren's plan and mentions that she got to speak to him once about Mikasa. She claims that Eren told her to throw Mikasa's scarf away and that she instead chose to wear it herself, prompting Mikasa to demand she gives it back.
Eren doesn't have children with Mikasa. The only person Eren could have gotten pregnant is Historia.
Jean's affection and love interest for Mikasa was hinted at throughout the series. She was the first person he checked on after a fight, and he prioritized her safety more than anyone else.
But the closest would be them being descendants of his brother/sister, making Mikasa and Levi, at best, third cousins for the closest.
The bloodline is still intact. The Hallucigenia (the source of all Titan powers) isn't even dead — it crawls out of Eren's head after the final fight, still alive. The foundation for the Titan system is still very much in place. The only thing that's changed is that Ymir chose to disable it.
In season two, Eren Yeager and Armin Arlert, among other Survey Corps members, began growing suspicious of two of their comrades, Reiner Braun and Bertholdt Hoover. Reiner and Bertholdt eventually confessed the truth to Eren, admitting they were not just Marleyans undercover, but Titan shifters too.
Approximately 80% of all human life on the planet was ended by the time the Rumbling was stopped prematurely by the combined efforts of the remnants of Paradis Island's Survey Corps and Marley's Warrior Unit.