The Reverse Au is where everybody is reversed! Kinda obvious :P
Looks, Personality, everything about them basically. For example, Todoroki isn't stoic. Instead, he is super emotional and crazy. Bakugo isn't angry and mean. Instead, he is timid and a crybaby.
Nariko isn't girly or lazy. She is highly energetic, tomboy-ish, and always angry about something. Her hair is dark orange and she wears tall wedge boots to make herself tall and Mighty. You can choose the scenario to start with.