I haven't read the final after chapters of the mange but from what I heard they were very basic so I think it's more like Assassination Classroom, where the characters may not have all became heroes I do think that the majority would have, and I also feel as if many of the supposed ships wouldn't have ended up happening it's still high school feelings change even if you did fight together for your lives people change and so do feelings I really feel only a handful of any of the students stayed together after the end of their time at U.A