Keffy is the fanon version of jeff the killer, he is a lone assassin, emo, joker, egotistical, sarcastic, mocking, foul-mouthed, keffy is friends with other fanon characters like vincent (the fanon version of the purple man from fnaf), Keffy considers himself beautiful, he hates fanboys and fangirls, he is a bit immature, stupid and 
silly, he is quite strong, besides he is a gary stu, he is an enemy of jane, slenderman and his brother liu, he is not interested in love, just kill for fun.