Where is Jeff from?
Well, my dears, he is from this creepypasta. He's a horror character thought up by someone on the internet, and his story has been copied and pasted anonymously onto several different sites. Don't worry. He's not real.
Is he friendly?
He's a killer. What do you think? Now, that doesn't mean he can't make friends. It's just that that kind of thing happens very rarely, and it's normally only with other creepypastas or people he respects.
What about the Mun?
Despite how I sound in the rules that are stated on this page, I'm actually quite a nice person as long as you don't tick me off. I'm willing to help you with your OCs, be the editor for your Creepypasta, cuddle you when you're having a bad day, or offer you cookies and hot chocolate when it's a boring and rainy day.