For context the way the game is set up is like a turn based rpg and there's three difficulty levels that are played in order because certain aspects of the story changes with each level. The characters also have alts where they can have a different element (they're the five basic ones: fire, water, earth, light, dark) and some may have different elements in the different levels. The transition from one difficulty to the next is kind of a time loop or a reset, but the MC is aware of the reset (and so far one other character is as well) and uses the experieces from the previous route in the next one. But some characters end up with different elements, and thus with slightly different personality traits, titles, life experiences, etc.,

At the time of me writing this I've played through normal, hard, and half of extreme modes with all being fully implemented in game. The most important point to consider is that each mode works like a time/ space loop and so far there are three times where the MC has to experience their journey in total. Only the MC and a few other key characters is aware of this loop (most other characters do not unless the MC tells them about it and hopes they believe them)