you could transform into a titan, but you were neither on Marley's side nor on Judea's side. You didn't seem to care about the war at all, so the Survey Corps put you in prison for safety.

you were already acquainted with Levi Ackerman and Hange Zoe. And you already knew that you wouldn't get rid of Hange easily.

you were sitting in your cell when Hange and Levi came. Hange was practically glowing with curiosity and joy.

Hange: "Hiiiiii~!"

Levi: "tch... let's just finish this quickly..."