Count my vote as bias since the only thing I know about Eren is that he's from Attack on Titan and that's it

Eren towards the end was a mess tbh

I think I'll choose Johnny. This isn't bias though because I actually like Attack on Titan better than JoJo. The reason why I say Johnny though has to do with his character arc, and how well rounded and complete it was. He's a jerk at first, but we realize why. He's paraplegic because he was snobby. He was snobby because his father hated him, and then, in a flash, his career is over because he messed with the wrong guy. His journey is about learning to stand, both physically and metaphorically. Eren on the other hand was always driven by hatred. And though AoT's writing is *chef's kiss*, toward the end, Eren fell apart as a character. I mean, his character arc makes sense, but his whole thing is just messy. Trying to destroy all humanity, basically committing omnicide save for the walls, killing men, women, and children, just to make a point? The Rumbling was a wreck. Paradis was becoming a recognized nation, and during it's time, it was the most powerful nation due to the Founder and it's Rumbling. They really only needed one thing to set Eldia free, and that was a test Rumbling. Maybe make a point out of Marley and go home. After all, only Marley declared war on Eldia. Make an example of Marley, a world Super Power, and watch as their enemies and allies alike flock to you. Bury the hatchet and help Marley stand up again, prove yourself as a competent country that is both peaceful and strong and eventually everything will work out. Eren instead killed 80% of all the Earth's population. Just to make a point on why war was bad. And it didn't even work! His own Jaegerists began violently militarizing and began picking fights with survivors, only to start a world war that left them decimated, and the power of the Titans returning in a new generation. Eren accomplished nothing except getting himself killed just as Jean said he would, but worse, he nearly took the world with him. Eren was a failure of a character with crappy motivations and a faux intelligent plan that, even though it succeeded, still ended with death. Season 4 was a waste of time. And the reason isn't because Eren intended to commit genocide only, but because he DIDN'T plan to. He turned Armin into the next Helos. That was literally his whole plan. Steal Fritz's whole plan, but make it exponentially worse. So while AoT is a fantastic series, the ending is meh, mostly because Eren was a real villain pretending to be a fake villain pretending to be a real one. They would have done better just to say Eren was turned extreme due to Ymir's hidden hatred and turn him into a REAL villain who wanted to be killed because he was no longer in control. That would have been better.

Johnny was a more grounded and relatable character tbh

Eren became a punk towards the end.