Which Arcs Best Showcase Character Growth In Deku Vigilante Manga?

Alright, so the vigilante Deku storyline isn't one continuous official manga, but a whole bunch of fan concepts and ideas that keep popping up. If we're talking about the moments across the main 'My Hero Academia' series that feel like they'd be part of a great vigilante arc for him, a few really stand out for showing how he changes under extreme pressure.

For me, the Shie Hassaikai arc, especially the Overhaul fight, is probably the foundation. He's operating outside UA's direct supervision with Sir Nighteye, and you see his strategic mind working overtime, but it's the raw, desperate rage after Eri gets hurt that cracks his usual heroic mold. He's not just saving someone; he's fueled by a fury that All Might might not approve of. That's a huge step towards someone willing to bend the rules.

Then the Paranormal Liberation War arc is where the 'vigilante' mindset fully crystallizes. When he makes the choice to leave UA to protect everyone, that's the definitive break. He's not a student anymore; he's a runaway asset acting on his own moral code, training alone, and facing the world's hatred. The fight against Lady Nagant is a perfect microcosm of this growth—he's trying to save a villain, to talk them down, using a power that's literally destroying his body, all while being public enemy number one. It's not about permission or grades; it's about what he believes is right, even if it costs him everything.

Honestly, the aftermath, the 'Dark Deku' period, is the peak of that character journey. He's isolated, gaunt, pushing himself past any sane limit, and his growth is almost backwards—it's about how far he'll fall into self-sacrifice before his friends drag him back. The growth is in the failure of that extreme, and the realization that being a hero, even a rogue one, can't be a solo mission. That whole stretch shows more brutal, visceral development than any school festival ever could.

Interesting question, because vigilante Deku is less a single arc and more a state of mind that peaks in the War arc and its fallout. The real character growth showcase isn't a typical 'training montage'—it's the decay. When he's on the run, you see his optimism strain under the weight of the world's fear. He's still trying to save everyone, but his methods become reckless, his self-care nonexistent. The growth is ugly; he's growing into a martyr, not a symbol.

What makes it compelling is watching the support system he built—Class A—force him to remember he's not alone. That confrontation on the street, where they all stand against his solitary suffering, reverses that toxic growth. It's a collective intervention that shows his real development: learning to accept help, which is the one lesson a true vigilante can never learn on their own.