Just to counter your comment. About the MC being able to go against the hero, at the beginning of the game, when the MC's identity is revealed to the world after the mall event. and you're going to escape the mainland. Nico kidnaps you, Michael, Alice, and Deryl to H.E.R.O. There is a dead end, where if you reject H.E.R.O's proposal, Nico will teleport you to space and you will die. And you will get a bad ending "You're not the ultimate lifeform just yet".
So, it's stupid for MC to go against H.E.R.O at his current level, H.E.R.O has many options to deal with MC and his friends. But when MC reaches level 5 and awakens the full power of THE EYE, there will probably be a chance for us to go against H.E.R.O and cut ties. I hope so! I was really upset when H.E.R.O's arc came out, and we were forced to join H.E.R.O with no choice, I liked the vibe of MC being a lone wolf.