You need to focus on the aspect ratio and panel layout. Webtoons usually have a vertical scroll format, so make sure your panels flow smoothly in that direction.
It depends on the terms and conditions you agreed to when you uploaded or submitted your comic to Webtoon. If you didn't carefully read and understand those, it's hard to say for sure.
The key to creating your webtoon comic is having a clear vision. Work on the script, practice your drawing skills, and experiment with different styles. And don't forget to get feedback from others to improve.
The characters would have a range of reactions. Some would be in disbelief. They have witnessed Deku's journey from a quirkless boy to a powerful hero - in - training. So, seeing him as a villain in a fanfiction would be like a complete 180 - degree turn. Midoriya's mother would be devastated. She has always supported her son, and to see him as a villain would go against everything she believed in. The teachers at U.A. would be concerned and start to analyze what could have led to this change. Maybe they would question their own teaching methods or if there were any signs they missed during Deku's time at the school.
Webtoon does have a few 18+ comics. However, their availability can vary depending on your region and the platform's content regulations. Some might be hidden behind age verification or specific access settings.
Well, it takes a lot of planning and creativity. First, you need a great story idea. Then, start sketching out your characters and their designs. And don't forget to practice your drawing skills regularly!