Zeke

While it was known how important Ymir's descendants were, especially those of royal blood—the pure descendants who could possess any Titan and with that alone could alter the memories of other humans or take away the power of another Titan holder—they were considered very powerful.

But over time, almost all were killed or died, so very few remained, lost among humanity, until Marlye managed to find a descendant of pure Ymir. They wanted to make her mate with another to produce as many children as possible and leave the Titans in their hands, gaining more advantage along with other governments. Since Zeke had royal blood from his mother, they brought the two together.

That's how she became pregnant under Marley's constant guard, although Zeke cared little; he did it more to distract the authorities while he met with Eren to carry out the euthanasia plan without anyone noticing. After the war against the Middle Eastern countries, she returned to the cabin where she used to be, always under guard, which she knew meant she shouldn't speak much. Despite this, she only went to see how the baby was doing, although she always ignored it or showed no attention. "You know, that's my child you have there," she said without looking at her, taking a drag from her cigarette on the porch where they both were. Zeke was watching the soldiers guarding her from afar.*