Had a thought about Lelouch and Suzaku from code geass being reincarnated into the BNHA universe and genuinely fucking shit up.
I love the idea of reformist terrorist and emperor Lelouch looking at the BNHA world with it's systemic discrimination, ghettoisation, post capital hyper consumption and income disparity, thinking, is anyone going to fix that? No? Okay
His grumbly but devoted sidekick Suzaku who handles the physical aspect of the BNHA world, because in this crossover, Suzaku actually lived a life as Zero, so as much as he hates how they got there, the Zero Requiem and Lelouch's plan did work. They also each other's check and balance on each other's violent tendencies, as well as enablers. Don't ask how that works, they're not sure either. Are they toxic and together, are they not? Or are they a secret third thing.
Lelouch would absolutely despise hero society and hate most villains too, because he finds their reasoning for their actions deplorable. As we know, he's not afraid to get his hands dirty, but only if it serves a greater purpose. Suzaku is somewhere in the middle, I think he would understand the HSPC a bit more, but is definitely against the creation of child soldiers that the BNHA universe tries to pretend are heros. It is their most contentious point, because Lelouch is hell bent on bringing down the HSPC, but the issue is, who takes over when the vaccume inevitably emerges?
Lelouch coming into contact with AFO and consistently outsmarting his plans, since his Geass, for all it behaves like a quirk is not actually one, thus can't be taken. Some quirky line or joke in there about being the real demon king.
He also takes over the LoV and the Meta Liberation Army, using them kind of like the black knights to push his agenda.
I think the duo would honestly start out with a bit of theatre, with Lelouch orchestrating fights with villains and Suzaku to make a point about quirkless discrimination, or hero brutality, hero spectacle and celebrity culture. I think he would also have a very Stain like effect, using viral videos to spread his message or something.
Eventually he does come into contact with Nezu, accuse him of creating child soldiers, perpetuating this highly discriminative celebrity culture, before trying to come up with a much more realistic solution to the power vaccume the fall of the HSPC would ultimately create.
I think both Suzaku and Lelouch would have a love and hate relationship with All might, because the symbol of peace is a) very reminiscnt of Zero and b) is thinly veiled hero worship and cultism that promotes passivity in the citizenry, which Zero also did and did not, because he was revolutionary symbol. That and they don't believe he's as pure of a person as he comes across.
I think the ultimate goal here would be to empower the civil justice system such as police, first responders, rescue authorities, civil courts, public defenders etc. rather than the privitized hero agencies.
So yeah Suzalulu rock BNHA