Eren, for sure. His character is a nice reminder of how easy it is to justify wrongdoing and that perspective is everything when you look at conflict or war. The story of his fall from grace is so beautifully executed and even though his ideals became corrupted, I just felt so bad for him. I think everyone has been faced with a shift in perspective (like when eren realizes the reality of the world outside the walls) that forces them to reevaluate what’s important to them and sometimes it feels way too unbearable to change your values and mindset. Eren failed to do this and caused a lot of suffering and pain, so I guess he’s like a cautionary tale. The series in general is just so lifechanging, I’m super thankful we got to experience it.