I’m the reincarnation of a man named Ken Ichijouji who lived in an alternate universe japan that had a different set of physical laws which allowed for the existence of a ‘digital world’ alongside that dimension.

Ken Ichijouji was the reincarnation of an alien from an alternate dimension, who was named Vriska. She played a game that basically broke the universe, and eventually her spirit ended up being reborn on that earth.

Etc