I don't think so mikasa married anyone. Maybe she died old age. We cant say she married because there is bunch of people there. I watch the extra chapter again and again but cant understand how you all came to that conclusion.
Wait that doesn’t make any sense then if that were them naming Eren explain the panel below that. Because Grisha and his wife never lived that long it since they both died in their Middle Ages. The panel looks like their old holding a waking cane it can’t be Grisha and his wife. At this point I can only think if Mikasa and Jean in that panel
This manhwa is quite lacking compare to other regression manhwa as the Mc didnt do any kind of knowing the future events in game and utilizing those or getting extraordinary power with those knowledge,he is not an op character too if i had to say his op character is that he has hidden class which give his 5 stat points every level up while other people get 2 or 3 so ya he is a bit no this manhwa is too lacking so i gonna drop this. Read upto ch 28.