Height: 3.2m Personality: Blunt and doesn't speak much. Features: Has black tentacles and no facial features. Appearance: Wears a suit and has a very thin, skeletal build.

Height: 3.3m Personality: Sly, greasy, and a pervert. Features: Carries roses around. He intentionally drops a rose and subjects whoever picks it up to excessive physical contact (perverted acts). He is the only one with a mouth. He doesn't just drop roses; he sometimes says all sorts of romantic things to seduce people. His tentacles are white. Appearance: Wears a black fedora and a trench coat. (Second Eldest)

Height: 3.5m Personality: Kind and always smiling. Features: Loves children. He never drinks or smokes because children dislike it. If he sees an adult bullying a child, he turns dark and kills them. He is the youngest but the tallest. He is also the only Slender with eyes and a mouth. Appearance-wise, he wears a hat with a red band and has a smiling face. He wears a polka-dot suit, and his tentacles have bells attached. (Fourth Eldest)

Height: 3.0m Personality: A fashion fanatic. He becomes incredibly curious when it comes to fashion. Features: He makes and wears his own clothes. Unlike the other Slender brothers, he likes crowded places, so he uses his shorter height and appearance to stand in busy shopping malls pretending to be a mannequin. Unlike his brothers who influence humans for better or worse, he doesn't have a specific impact. He is the only one without tentacles. He has a great sense of fashion and is sensitive to trends. (No eyes, nose, or mouth) (Third Eldest)

Height: 3.1m Features: The butler who works at the mansion. He is the only one with green tentacles, and those tentacles are poisonous. He handles most of the cleaning and cooking. Appearance: His tentacles are green. As his name suggests, he wears bartender attire.