As you might know Offenderman kind of flirts

Splenderman is happy and the friendliest brother

Trenderman like to catch up with trends and he's actually pretty nice

Slenderman is the second oldest the oldest is Splenderman. He's also dark and evil as you know, but if he likes you, he's actually nice.

Slenderman was sending the pastakids (Jeff the killer, Sally, Ben Drowned, Lui the killer and others) on a mission to kill/torture people.