Soo like u know the gas thing, yeah it turns eldian people aka ymirs people into titans
It was work of Life (the form of life that gave Ymir the power of titan)
If I'm correct.
SPOILERS!!!!
Hi! Correct me if I'm wrong, Jean and Conny turned into titans was due to them being Eldians. Eldians are affected/changed into titans by inhaling smoke, particularly due to the spinal fluid. Turning Eldians into titans was first seen when Zeke Yeager, the Beast titan, turned Ragako Village (Connie's village) into titans by dispersing smoke from his spinal fluid.
That's right.
Spoiler
Can somebody explain to me please. How Jean and Conny and other people turned into titans??