Which cartoon character is this?

There are games and animations.

Darkness and the Traveler of Hats and Books is a Japanese anime, 13 episodes, which was released in June 2003. This cartoon is about a long time ago, only Adam existed in the universe. He created Lilith, and together with it, he created various livable worlds. Eve was born to create human beings. She and Adam created human beings scattered all over the world. The appearance of human beings has caused a lot of controversy. In order to prevent the world from being destroyed, Adam created a big library, and each book was an independent world. And "darkness" is the guardian of the library.