Fun fact about Monotonous and his people, it’s basically in their culture to wear helmets (or at least in public) and they were taught that “fun” or “joy” was a distraction because Monotonia’s first Lord proclaimed so and then cursed their land in eternal darkness to enforce that

Present day Monotonous would try to take this a step further by casting the whole world in darkness but long story short he had a change of heart and basically uncursed Monotonia

and also he’s Alexevil’s dad