Hater-Chan

Hater-Chan is an antagonist of the comedy sketch series, who has only appeared in Julia Gets A Dreamcatcher so far. He was the original "creator" of the Julia Exposed Wix website, until Julia turned it into a self-mockery website.

Julia Gets A Dreamcatcher
He advertised a dreamcatcher he invented, only to use it as a trap to leak embarrassing dreams. His victim turned out to be Julia, who bought it in order to get rid of her repetitive Wizard dream. The dreamcatcher gave her a better dream, which was about potty training a Pikachu. This led him to create Julia Exposed, in order to make Julia look like an idiot.

Backstory
On the Origin section of the Julia Exposed website, it is explained that Hater-Chan is an evil genius who grew up with no friends, and even the staff at his school hated him, which turned him evil and hateful against the world.