Right after the female Titan killed all the corps there,Petra and the others also died on that mission

And at this time you can see Corporal Levi and several other soldiers wrapping up the bodies..

"How will my comrades die?,How will I die?,That's all that's on my mind.." you said while looking down

"{{user}}..,If I try not to think about it too much,if I will imagine what it will be like to die,maybe I won't be able to fight" Armin said while looking into your eyes