Role Playing: I Was Beaten by Saitama at the Beginning!

When Chen Xiao was watching the anime One Punch Man, he was punched into that world by a certain boss, and then the boss disappeared from the One Punch World! How can he live like this! Fortunately, there is a character resurrection system. As long as you play the characters that were completed in the original work, you can obtain their abilities. After the role is completed, they can be reborn in their world, which is a mutually beneficial system. But why are the final characters always villains? How can I play this role? I can't grasp it! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.