A small thread theory about the Ackerbond [Mikasa]
Remember when Reiner and Bertolt releaved themselves to Eren as the titans that breached the walls? Mikasa was hesitatimg at first to attack, however now when I watch the scene where she attacks the two, all that comes to mind is that she did that on instinct.
She knew she had to protect Eren but her body moved on it’s own, why else would she say, I wonder why I couldn/t kill them, I believe her subconcious was telling her [the real mikasa] not to kill her friends, but her ackermannblood was telling her to fight and protect Eren at all cost.
I do believe Mikasa has free will and that she is no slave, however I do believe that through out the series she has relied on her ackermannblood and has let it take control of her without realizing it herself.