"Mikasa was obsessed with Eren" vs actual obsession:
To state the obvious: Mikasa was able to break from her previous glowing conception of Eren and think for herself, gaining a more complete picture of Eren as a person. If she was the shallow character people claim her to be, Mikasa would not have opposed the Yeagarists - she would've fallen in line, becoming an unthinking supporter of their fascist, genocidal reign. Instead, Mikasa killed Eren, not allowing her love to keep her bound, ending the titan curse.
Which is a stark contrast to Louise and Floch. They fell for the facade Eren presented them, unquestioning. Eren didn't give a shit about the "Eldian Empire." He used the Yeagarists for his own aim - an unoccupied outside world - ambivalent to their deaths. Eren preyed on their fear of annihilation, allowed their terror to fester and blossom into dehumanization, ultra-nationalism, and imperialist aims, all for him to use them as a tool to start the Rumbling, so he could "see that sight." Louise and Floch idolized Eren, whipped up into a fervor, unconscious to his true goal.
Eren himself recognized the humanity of the people living beyond the walls. He grew to understand differing perspectives, notably Reiner's. He cried to Ramzi, apologizing for what he knew he would do. Yet, he still did it. Empty without the "freedom" he sought, the look in Armin's eyes, an internal freedom he mistook as an external goal. Telling himself and others he was doing it for Eldia (despite trampling Eldians outside the walls), for his friends (despite not knowing if they'd live), anything to distract himself from his own selfish desire.
I do find Floch and Louise fascinating characters as a way to break down idolatry and how people can become radicalized into fascism. I actually find Floch quite entertaining, and I like that we get to see how he got to that place. And I like seeing how other characters (Mikasa, Jean, and Onyankopon) react to his takeover and his offer to join the Yeagarists. Louise and Floch almost serve to reflect alternative paths for Mikasa and Jean respectively, who they could've been if they gave into their worst traits - single-minded devotion for Mikasa, selfishness for Jean. Fascinating stuff all around













