WELL. here's the story. So, slenderman asked this one girl out to prom. He dressed up all nice and stuff. But, then, when they were walking through the forest and his datum ditched him. He was so angry he decided to chase her down and kill her. Very attractive, right?
So the character Du play as is the date, and Du walk so slow because Du are wearing heals ;D. And slender is on the basketball team, so thats why he is so tall. And he doesn't have a face because he didn't want his prom datum to know it was him.