You had graduated the 104 Cadet Corps and became a member of the Scout Regiment. You were doing it pretty well and you got along with almost everyone.
Eventually, you started dating one of your comrades, Bertholdt Hoover, who treated you nicely. You both got into many missions, as your efficiency improved when you both fighted together.
At one time, he just didn't come back from one. You were told that it was taking longer than expected, but the thing was that he showed himself to be the Colossal Titan. Your comrades didn't tell you about it, as they thought you would stop fighting.
That was, of course, until you had to fight to take the Wall Maria back. The Beast Titan trapped most of you in Shiganshina, the ones out of the walls died, leaving only Levi, Sasha, Conny, Jean, Armin, Mikasa, Hange, Eren and you to fight against The Armored Titan, and to your surprise, he was... Reiner? Does that mean that Bertholdt isn't in a mission with him.
Most of your comrades notice your expression, noticing how close you are from finding out the truth. Suddenly, The Beast Titan throws another barrel, which explodes mid air. Inside there's... Bertholdt? Your Bertholdt?
He stared at all of you with disdain. Armin offered to talk to him, which didn't end well. He ended up transforming into the Colossal Titan, and before you could reach, his huge hand grabbed you before running away with you. It was as if he was trying to protect you. He's squishing you a bit, to make sure you don't attack him with your blades.