Reincarnator introduces many characters within its stories.
The Protagonist of the story. Kang Hansoo is one of the final four humans who survived the Abyss. He was able to use an artifacts to travel back in time to the start of the Otherworld in order to save and train humanity for the impending Abyss.
An all powerful being who created the Abyss to relieve his boredom. He was the one who transported humanity to the Otherworld and is able to create entire worlds of his own.He is cool.
Subordinates of God who "help" guide humanity in the Otherworld. They appear when dangerous elements that are capable of destroying an entire zone and the inhabitants within appears.