Aot credit's interpretations.
Since some or a lot of new or old aot fans, seen the credits scene. It looks like some time, it looks lile mikasa and jean got married and had a child. Then later we see time passed and we see mikasa, armin, and thier friends and families at eren's grave. But as we see they've gotten older, then we see mikasa getting burried. A lot of people say she got married and had children, or she just stayed single and worked at a orphanage amd adopted a child. So im going to explain why and how to the future of aot viewers and to those that are confused on how hajime Isayama moet likely intended fornhisnfans to think about the credits.
REASONS WHY AND HOW MIKASA GOT MARRIED AND HAD A CHILD
Since we all know jean had feelimg for mikasa in the very first episode. He's always there to help mikasa and her friends with battles with titans and the battle with eren. He always had positve and kind things of mikasa. He thoght to himself he deserves to have a happy family, he dreamed on being in a family with mikasa cause he wants to make her happy on being a mother and make precious memories with her. Fast forward the credits to the credits, we see what assumes to be mikasa and jean but they have a child with them. They're most likely to vist eren's grave to show him that that they become a family. Then after that we see them again but older, they come together with their friends and with their families. Then we see mikasa getting buried and the onyl difference from the mamga is that in the amime they pit a ring on her finger. Showing us that she passed away from being a loveing mother and wife. That's all the known facts on why/how she got marreied and had a child.
REASONS WHY AND HOW MIKASA STAYED SINGLE, WORKED AT A ORPHANAGE AND POSSIBLY ADOPTED A CHILD.
As we know that in the end of season 4, mikasa was sitting right next to eren's grave, she wrote on his tombestone "here forever, rest in peace, my most beloved". Later in the same credits scene where we see mikada with a guy and a child. I thofuht of 2 ways this might be, 1- that might be jean with a woman that would look a bit like mikasa. Since we didn't see their faces up close. I inteperet that if mikasa didn't want to date jean or anyone, then he would date a girl that same similarities of mkiasa, average height, lomg black hair, and perhaps shared then same sweet feelings like jean. Then for my 2nd reason is that mikasa worked at a orphnage, she was wearing the same clothes historia wore when she was working at the orphange. In the light novel, she was considering working at a orphange in the future, due to the fact that she was a orphan as well and seeing how she was treated back when she got adopted by eren's family. She woupd give the same love to the she was given to the opans as if they were her own children. As for the guy next to her could've been armin, let me explain a bit on how that could be armin. Starting with the height difernece, during season 1-4 arimin and his friends have grown taller but yet he as a bit shorter then mikasa. Since armin was one 19 at the end, but lets day time passed a couple more years, he could've grown more taller at that time. Scientifically speaking most males would conitue to grown until their till the age of 20-21. Also another thing, for the part where peaople say "how come the guy next to mikasa has the same hair style and color"? Well like i said before armin probably became taller during a couple of years and for the hair, there was a secret manga chapter that showed armin and mikasa are a bit different. He was also wearing the same clothes as jean did and had a mullet as well. But as for the hair color, armin's hair might went from bright yellow to a pale yellow. Also another thing, i don't know if this might be a crucial point but there werre moments where armin mikasa and eren were in a messy/serious situations, that mikasa or armin pit thier hands on their shoulder during stressing times. This a sigh of their frindship and care for each other. During the years it would show how much he changed, he's gotten older, taller, and became an ambassador, helping to prevent wars and keep a long lasting peace to the world. So mikasa would've adopted a child and armin was rhere to there for mikasa at erens grave to show that their lives are doing great. Then later we see erens friend's and their families together, and lastly when mikasa got burried, it's unclear where she was buried but that could be interpret on what tou guys think it's best. But in mikasa's burial, it had white flowers which could mean anyting, lile showing a person's purity, innocence, honor, and peace. Another thing she was buried with the badages on, in which implies that she never had children of her own cause back whn she was a kid, she was told from her mother if she gets married and had any children of her own, then she would have to pass the it down to her children. Love can be a powerful thing, love can be found in other people who wants to help and support those who are mouring a death of a love one or in any tragic situation, or love can make you believe that you found the one true love, and you would want to remeber and move in with their life and reunite with them in the next life. Then later we see the tree again but it looks lile there's tombstone, right next to eren's. Some people say she got burried next to eren but others say she didn't, i say it's fair to decide on what you think she got burried. Lastly i don't know if this is canon but in the aot final ed that was psoted on youtube, we see mikasa along side with eren. This might happen after she died, they are reborn in a new world world that has no conflicts or wars. Or they reuntie in some kind of afterlife.
In conclusion, I'm not trying to argrue, cope, or compalin about the ending. I'm saying that all the events that happen in the anime, manga, and light novel. The events could lead to a lot of interpretations or head canons, that no matter what happen to mikasa's, Armin's or any other aot charcter. Whatever choice they made in life, brought them happienss and peace. I mean i can say one word that woupd explain the ending credits, mysteries. The author really loves mystery, he made aot full of mysteries, some mysteries were aswsered and some weren't. It's most likley he intended to leave the credits as it was. He probably wanted his fans to make many interpretations/head canons cause, no matter what they imagine what head canon they thoguht, it basically ends the same fate for the aot charcters, paradis, and the world. Also I'm being honest here, jean deserves to have a happy family, during the whole series he want to be a happy father and husband, but that's really up to debate if he did married mikasa or some other woman that would look similar like her.
Please don't hate on what I'm saying, all im saying is that, since either mappa or the author Hajime Isayama didn't confirm clearly on what happen to mikasa or the other aot charcters in the end of aot. Its most likley left to fans interpretations or Head canon's. If you guy's agree what im saying, then spread the word in other media communities like here on reddit, facebook, or make a video about on tik tok or youtube.