Attack On Titan Why Did Ymir Leave - But maybe they porco and marcel didn't transform into having hardened sections like the armored titan, but like the female has to harden them.

Not only did she give marley back the titan power they had lost (assuming that ymir is dead from the latest chapter?) and also possibly unless ymir isn't really dead and/or she has something planned, it sounds to me that she made a really a bad decision helping rb.